City Research Online

Total Page:16

File Type:pdf, Size:1020Kb

City Research Online City Research Online City, University of London Institutional Repository Citation: Cross, I. (1989). The cognitive organisation of musical pitch. (Unpublished Doctoral thesis, City University London) This is the accepted version of the paper. This version of the publication may differ from the final published version. Permanent repository link: https://openaccess.city.ac.uk/id/eprint/7663/ Link to published version: Copyright: City Research Online aims to make research outputs of City, University of London available to a wider audience. Copyright and Moral Rights remain with the author(s) and/or copyright holders. URLs from City Research Online may be freely distributed and linked to. Reuse: Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. City Research Online: http://openaccess.city.ac.uk/ [email protected] The Cognitive Organisation of Musical Pitch A dissertation submitted in fulfilment of the requirements of the degree of Doctor of Philosophy in The City University, London by Ian Cross September1989 ABSTRACT This thesis takes as its initial Premise the idea that the rationales for the forms of pitch organisation employed within tonal music which have been adopted by music theorists have strongly affected those theorists` conceptions of music, and that it is of critical importance to music theory to investigate the potential origination of such rationales within the human sciences. Recent studies of musical pitch perception and cognition are examined, and an attempt is made to assess their capacity to provide sustainable rationales for pitch organisation in tonal music. Theoretical and experimental studies that focus on sensory processes are critically reviewed, and it is suggested that these do not adequately characterise important aspects of musical pitch organisation. Studies that examine more central cognitive constraints are discussed, and a detailed critique is made of recent cognitive-structural approaches to the representation of musical pitch. It is proposed that a significant aspect of tonal pitch organisation, diatonic structure, is neither adequately investigated nor provided with any compelling rationale by these studies. Three series of experiments on the perception and representation of diatonic structure are presented: it is suggested that the sensitivity to properties of diatonic structure shown by listeners in these and in other experiments implies that a representation of diatonic interval structure constitutes an important component of the cognitive organisation of musical pitch. A possible basis for this sensitivity is further explored, and a group-theoretic rationale for the musical use of diatonicism is proposed. The nature of the cognitive representation of diatonic interval structure is discussed. and relationships between diatonic structure. other western scale forms. tonality and (briefly) atonality are outlined. Ian Cross. September 1989 ACKNOWLEDGEMENTS In submitting this thesis. I wish to acknowledge the debt which I owe to a number of individuals who have assisted me in many ways. First of all, I wish to thank Natasha Spender; she introduced me to this area of research, and provided valuable and stimulating comment in the early stages of my research. Secondly, most of the experiments described in Chapters six, seven and eight were undertaken with the collaboration of Peter Howell and Robert West. They acted as my de facto "supervisors" in the psychological domain, at times in a personal as well as an intellectual sense. To Rob I owe thanks for his ability to offer succinct interpretations of some of my more deeply "nested" ideas, while to Pete in Particular I owe thanks for his tendency to instruct me to "go and do it" on those occasions when theory seemed more enticing than the corralling of experimental subjects. The exact nature of our collaboration - in terms of specifically who did what - is now a little difficult to disentangle. At one level, Pete and Rob were concerned to ensure the application of appropriate psychological method, and to ensure that any broad psychological implications of the design and results of the experiments were not overlooked. while my concern was directed more towards the elucidation of specifically musical and musico- cognitive problems. This is not to imply a simple split in responsibility for psychological and musical issues, however, for at a more detailed level I was directly responsible for the design and conduct of many of the experiments (including several not reported here which, through a process of attrition, helped to determine the forms and aims of subsequent experiments). Similarly. while I would claim responsibility for most of the ideas expounded in the course of describing the experiments, many of these were tested, or had their seeds in, discussions with Rob and Pete. Having claimed this responsibility, I am also obliged to claim sole responsibility for any errors or omissions in methodology or logic that remain. To many others I owe thanks for comments and encouragement. In particular. though. I would like to thank Malcolm Troup, for without the sheer and outrageous liveliness that he brought to Music at City University the act of musical discovery would not have been half so enjoyable. Lastly, most thanks to Jane, for understanding. CONTENTS Chaoter Subhead Pa e CHAPTER ONE 1 CHAPTER TWO The perception of pitch 8 Patterson's spiral detection of periodicity 10 The spiral processor and the organisation of 11 music pitch Terhardt's model of pitch perception 16 Terhardt's model and music 19 Parncutt and "pitch commonality" 24 Pitch categorisation 30 CHAPTER THREE Sound sources and auditory streams 34 Contour 40 Interval, scale and key 42 Scale, key" mode - music theory 49 Scale, key, mode - cognitive representation 55 CHAPTER FOUR Structural representations of musical pitch 63 The double helix representation of musical 67 pitch The cognitive-structural model - experiments 70 A cognitive-structural model for chords 74 and keys - experiments Cross-cultural evidence for the 79 cognitive-structural model The cognitive-structural model - implications 83 for perception CHAPTER FIVE Problems with the cognitive-structural model 90 Experimental results - lack of fit with 91 theory Experimental materials and their relation 94 to theory Tonal hierarchy - acquired by learning or 97 acculturation ? Separability of syntax and duration 99 The "representativeness" of contexts 100 The "informational" approach - objections 104 The neglect of scale structure 106 Problems with experimental approaches to 110 musical pitch cognition The group-theoretic representation of 113 musical pitch The unexplored question 118 CHAPTER SIX Experimental Series 1 121 Procedures for generating experimental 126 sequences Experiment 1.1 129 Experiment 1.2 135 Experiment 1.3 137 Structural bases for first-order preference 139 Experiment 1.4 144 Experiment 1.5 148 CHAPTER SEVEN Experimental Series 2 154 Experiment 2.1 157 Experiments 2.2 and 2.3 169 CHAPTER EIGHT Rarity and ubiquity - Browne and the 179 diatonic set Experimental Series 3 186 Experiment 3.1 189 Experiment 3.2 191 Multiplicity and equivalence relations 195 Experiments 3.3 and 3.4 198 Experiment 3.5 205 Experiment 3.6 210 CHAPTER NINE Conclusions 214 Diatonic subset representativeness and 215 interval vector similarity Diatonic rarity and the attribution of 224 tonal centre Group-theoretic rationale for 226 diatonic structure Diatonicism, major and minor 228 Scales as theories 230 Tonality and the diatonic set 233 Diatonicism and atonality 240 REFERENCES 243 CHAPTER ONE Pitch has generally been regarded as the dominant structural dimension of western music: the way that pitch is organised within that music is complex and idiosyncratic. As musical styles have changed it has changed, with changes in pitch organisation often constituting the principle feature of style change; however, certain constancies appear to remain even through these style changes. The constancies of pitch organisation in western music over the last four hundred years are usually referred to as the principles of tonality. exemplified in the employment of successions of triadic chords within major and minor keys to articulate musical structure. In attempting to codify the principles of tonality (whether for ontological, aesthetic or pedagogical purposes) theorists have continually sought or advanced rationales for the particular forms of pitch organisation - triads, triadic successions and keys - employed within tonal music. These rationales have often come to play significant roles in shaping ideas about what constitutes the "stuff" of music. I The importance and influence of these rationales can be seen most clearly in musical analysis. The structure of a piece of music as revealed in analysis can often be related directly to the particular rationales for pitch organisation - or even to the nature or phenomenal locus of those rationales - that an analyst chooses to employ. That is. the criteria that are used in an analysis for expressing the actual pitches of a piece of music in terms of the representation peculiar to the analytic method applied can be directly referable to the rationales for the structure of triads or keys that have been incorporated into that (1) analytic method. Hence the claims made by analysts as to what facets of music or musical experience an analysis represents - and the controversies that may arise around these claims - can be determined at least in part by the analyst's adoption of specific rationales for pitch organisation in tonal music. The point is perhaps best made by providing a concrete example. influential Currently, the most and widely applied method of musical analysis of western tonal music is that developed by Schenker. It is Heinrich possible to see, in the structures that Schenkerian analyses-reveal. the importance of the rationale for the structure of triads and keys that is used within that analytic system.
Recommended publications
  • Major Heading
    THE APPLICATION OF ILLUSIONS AND PSYCHOACOUSTICS TO SMALL LOUDSPEAKER CONFIGURATIONS RONALD M. AARTS Philips Research Europe, HTC 36 (WO 02) Eindhoven, The Netherlands An overview of some auditory illusions is given, two of which will be considered in more detail for the application of small loudspeaker configurations. The requirements for a good sound reproduction system generally conflict with those of consumer products regarding both size and price. A possible solution lies in enhancing listener perception and reproduction of sound by exploiting a combination of psychoacoustics, loudspeaker configurations and digital signal processing. The first example is based on the missing fundamental concept, the second on the combination of frequency mapping and a special driver. INTRODUCTION applications of even smaller size this lower limit can A brief overview of some auditory illusions is given easily be as high as several hundred hertz. The bass which serves merely as a ‘catalogue’, rather than a portion of an audio signal contributes significantly to lengthy discussion. A related topic to auditory illusions the sound ‘impact’, and depending on the bass quality, is the interaction between different sensory modalities, the overall sound quality will shift up or down. e.g. sound and vision, a famous example is the Therefore a good low-frequency reproduction is McGurk effect (‘Hearing lips and seeing voices’) [1]. essential. An auditory-visual overview is given in [2], a more general multisensory product perception in [3], and on ILLUSIONS spatial orientation in [4]. The influence of video quality An illusion is a distortion of a sensory perception, on perceived audio quality is discussed in [5].
    [Show full text]
  • The Octave Illusion and Auditory Perceptual Integration
    The Octave Illusion and Auditory Perceptual Integration DIANA DEUTSCH University of California, San Diego, La Jolla, California I. Introduction . 1 II. The Octave Illusion . 2 A. The Basic Effect . 2 B. Handedness Correlates . 4 C. Further Complexities: Ears or Auditory Space? . 6 D. Dependence of the Illusion on Sequential Interactions . 6 III. Parametric Studies of Ear Dominance . 7 A. Apparatus . 7 B. Experiment 1 . 7 C. Experiment 2 . 9 D. Experiment 3 . 10 E. Experiment 4 . .11 F. Hypothesized Basis for Ear Dominance . 13 G. Discussion . 13 IV. Parametric Studies of Lateralization by Frequency . .15 A. Experiment 1 . 15 B. Experiment 2. 16 C. Experiment 3 . 16 D. Experiment 4 . 16 E. Discussion . 18 V. The What–Where Connection . 18 Discussion . 19 VI. Conclusion . 19 References . 20 I. INTRODUCTION hemisphere damage to Brodmann’s areas 39 and 40 has been found to produce deficits in visual perceptual clas- A philosophical doctrine stemming from the empiri- sification (Warrington and Taylor, 1973). Further, vari- cists of the seventeenth and eighteenth centuries is that ous studies on human and subhuman species point to objects manifest themselves simply as bundles of attrib- an anatomical separation between the pathways medi- ute values. This doctrine has had a profound influence ating pattern discrimination on the one hand and local- on the thinking of sensory psychologists and neurophys- ization on the other (Ingle et al., 1967-1968). For exam- iologists. For example, it is assumed that when we see an ple, Schneider found that ablation of visual cortex in object, we separately appreciate its color, its shape, its hamsters led to an inability to discriminate visual pat- location in the visual field, and so on.
    [Show full text]
  • Music Perception 13
    Music Perception 13 LEARNING OBJECTIVES ISLE EXERCISES 13.1 Kurdish Music Example 13.1 Explain how frequency is related to pitch, chroma, and the octave. 13.2 Javanese Gamelan Music Example 13.2 Summarize the basic neuroscience of music, including how training and experience can affect the representation of music in the brain. 13.3 Ancient Greek Music 13.4 35,000-Year-Old Flute 13.3 Discuss how learning and culture affect music perception. distribute 13.5 Is This Music? 13.6 The Octave and or Tone Similarity INTRODUCTION 13.7 Pentatonic Music 13.8 Meter and Beat Wherever you travel, you will find music. It may sound very different from the music you are accustomed to hearing, but you will recognize it instantly as music. In Kurdistan, we 13.9 Bolero Clip find a unique culture of music featuring such instrumentspost, as the tanbur (a fretted string 13.10 Attack and Decay instrument), the qernête (a double-reed wind instrument), and the şimşal (a flutelike 13.11 Examples of Melody instrument) (Figure 13.1). Although most of you may never have heard of these instru- ments and may never have heard Kurdish music before, you would instantly recognize 13.12 Types of Scales them as musical instruments, and you might even like Kurdish music (see ISLE 13.1 for 13.13 Gestalt Principles an example of Kurdish music). Review copy, © Aurora Photos/Alamy 13.14 Gestalt Principle: Proximity: Bach’s Partita No. 3 in E major not 13.15 A Shave and a Haircut 13.16 Cross-Modal Matchings as a Simulation of Synesthesia Do 13.17.
    [Show full text]
  • A Criterion-Related Validity Test of Selected Indicators of Musical Sophistication Using Expert Ratings
    A CRITERION-RELATED VALIDITY TEST OF SELECTED INDICATORS OF MUSICAL SOPHISTICATION USING EXPERT RATINGS DISSERTATION Presented in Partial Fulfillment of the Requirements for The Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Joy E. Ollen, M.A. * * * * * The Ohio State University 2006 Dissertation Committee: Approved by Professor David Huron, Adviser Professor David Butler ____________________________________ Professor R. J. David Frego Adviser School of Music Professor Joseph Gliem Copyright by Joy Elaine Ollen 2006 ABSTRACT Music researchers regularly test the hypothesis that participants will respond differently based upon their levels of musical sophistication. Circumstances may not permit any extensive pre-testing and researchers often select or group participants according to their answers to simple survey-type questions related to their musical background. A number of these indicators have been criticized as being inadequate; yet, to date, their validity has remained untested. The goal of this dissertation was to test the validity of selected indicators, using expert ratings as the criterion variable, and to compile a short questionnaire that researchers may use to classify research participants as either more or less musically sophisticated. To that end, three survey projects were conducted. The first project sampled 743 music studies published between 1928 and 2004 in order to obtain information about how researchers were measuring musical sophistication. Two of the most commonly used indicators were “Formal musical training” (e.g., years of private lessons) and “Year or level in a formal music program” (e.g., music or non-music major). However, 38 different categories of indicators were identified in the sample and were used in 173 unique ways—either singly or in combination.
    [Show full text]
  • Chapter 8 the Perception of Auditory Patterns Diana Deutsch University of California, San Diego
    Chapter 8 The Perception of Auditory Patterns Diana Deutsch University of California, San Diego 1 INTRODUCTION Over the last half-century a considerable body of knowledge has accumulated concerning visual shape perception, based on findings in experimental psychology, neurophysiology, artificial intelligence and related fields. These developments have not, however, been paralleled by analogous developments in audition. It is inter- esting, therefore, that the foundations of pattern perception were laid by scientists who were as much concerned with auditory and musical phenomena as they were with visual ones. Wertheimer (1924/1938) described the beginnings of Gestalt theory thus: 'Historically, the most important impulse came from von Ehrenfels who raised the following problem. Psychology has said that experience is a compound of elements; we hear a melody and then, upon hearing it again, memory enables us to recognize it. But what is it that enables us to recognize the melody when it is played in a new key? The sum of its elements is different, yet the melody is the same; indeed, one is often not even aware that a transposition has been made.' (p. 4) In another paper in which he proposed the Gestalt principles of perceptual organization, Wertheimer (1923/1955) frequently presented musical illustrations along with visual ones. For example, in order to illustrate that 'more or less dissimilarity operates to determine experienced arrangement' he wrote: 'With tones, for example, C, C~, E, F, G~, A, C, C~... will be heard in the grouping ab/cd... ; and C, C~, D, E, F, F~, G~, A, A~, C, C~, D ... in the grouping abc/def' (1923/1955, p.
    [Show full text]
  • Cognitive Neuroscience of Music 1 Cognitive Neuroscience of Music
    Cognitive neuroscience of music 1 Cognitive neuroscience of music The cognitive neuroscience of music is the scientific study of brain-based mechanisms involved in the cognitive processes underlying music. These behaviours include music listening, performing, composing, reading, writing, and ancillary activities. It also is increasingly concerned with the brain basis for musical aesthetics and musical emotion. Scientists working in this field may have training in cognitive neuroscience, neurology, neuroanatomy, psychology, music theory, computer science, and other allied fields. Cognitive neuroscience of music is distinguished from related fields such as music psychology, music cognition and cognitive musicology in its reliance on direct observations of the brain, using such techniques as functional magnetic resonance imaging (fMRI), transcranial magnetic stimulation (TMS), magnetoencephalography (MEG), electroencephalography (EEG), and positron emission tomography (PET). Neurological Bases Pitch For each pitch there is a corresponding part of the tonotopically organized basilar membrane in the inner ear which responds to the sound and sends a signal to the auditory cortex. Sections of cells in the cortex are responsive to certain frequencies, which range from very low to very high in pitches.[1] This organization may not be stable and the specific cells that are responsive to different pitches may change over days or months.[2] Melody Processing in the Secondary Auditory Cortex Studies suggest that individuals are capable of automatically
    [Show full text]
  • A. Acoustic Theory and Modeling of the Vocal Tract
    A. Acoustic Theory and Modeling of the Vocal Tract by H.W. Strube, Drittes Physikalisches Institut, Universität Göttingen A.l Introduction This appendix is intended for those readers who want to inform themselves about the mathematical treatment of the vocal-tract acoustics and about its modeling in the time and frequency domains. Apart from providing a funda­ mental understanding, this is required for all applications and investigations concerned with the relationship between geometric and acoustic properties of the vocal tract, such as articulatory synthesis, determination of the tract shape from acoustic quantities, inverse filtering, etc. Historically, the formants of speech were conjectured to be resonances of cavities in the vocal tract. In the case of a narrow constriction at or near the lips, such as for the vowel [uJ, the volume of the tract can be considered a Helmholtz resonator (the glottis is assumed almost closed). However, this can only explain the first formant. Also, the constriction - if any - is usu­ ally situated farther back. Then the tract may be roughly approximated as a cascade of two resonators, accounting for two formants. But all these approx­ imations by discrete cavities proved unrealistic. Thus researchers have have now adopted a more reasonable description of the vocal tract as a nonuni­ form acoustical transmission line. This can explain an infinite number of res­ onances, of which, however, only the first 2 to 4 are of phonetic importance. Depending on the kind of sound, the tube system has different topology: • for vowel-like sounds, pharynx and mouth form one tube; • for nasalized vowels, the tube is branched, with transmission from pharynx through mouth and nose; • for nasal consonants, transmission is through pharynx and nose, with the closed mouth tract as a "shunt" line.
    [Show full text]
  • Essay Deutsch D
    1 Essay Deutsch D National Hearing Conservation Association Annual Conference , 2003, February, Dallas. Invited lecture. Invited Lay language paper presented at the 156th meeting of the Acoustical Society of America. Absolute pitch is associated with a large auditory digit span A clue to its genesis. Mozart Festival, Kennedy Center for the Performing Arts , 1998, Washington, D. 1983, November. Schiffman, Sensation and Perception. Heller and W. , and Dooley, K. Auditory Perception, Cognition and Action Meeting , 2002, November, Kansas City. Stereo TV, Invited presentation. Marks, The Unity of the Senses. Journal of the Acoustical Society of America , 1996, 99, 2482,. The pitch levels of female speech in two Chinese villages. , Sensation and Perception. Physics Today , 2010, February, 40-45,. Ear Club , 2004, May, Department of Psychology, University of California, Berkeley. Invited Lay language paper presented at the 148th meeting of the Acoustical Society of America, San Diego, November,. New York Oxford University Press. Mozart Festival, Kennedy Center for the Performing Arts , 1998, Washington, D. Basic Structure and Function in the Central Nervous System , 1974, New York MacMillan Co. Representation of pitch and pitch combinations. Invited Lay Language paper presented at the 149th Meeting of the Acoustical Society of America. and Deutsch, D. Musical space. Two issues at the interface between speech and music. Paper presented at the. Winter Conference on Brain Research , 1986, Keystone. International conference on Psychology and the Arts , 1983, Cardiff, Wales. Psychonomic Society Meeting , 1984, El Paso. Encyclopedia of Perception , 2009, 1, 160-164, Sage. Invited Presentation, Annual meeting of the. , Psychological Foundations of Musical Behavior. , and Dooley, K.
    [Show full text]
  • Why You Hear What You Hear
    Web: http://www.pearl-hifi.com 86008, 2106 33 Ave. SW, Calgary, AB; CAN T2T 1Z6 E-mail: [email protected] Ph: +.1.403.244.4434 Fx: +.1.403.245.4456 Inc. Perkins Electro-Acoustic Research Lab, Inc. ❦ Engineering and Intuition Serving the Soul of Music Please note that the links in the PEARL logotypegyp above are “live” and can be used to direct youry web browser to our site or to oopenpen an e-maie-maill message winwindowdow aaddressedddressed to ourseourselves.lves. To view our item listings on eBay, click here. To see the feedback we have left for our customers, click here. This document has been prepared as a public service . Any and all trademarks and logotypes used herein are the property of their owners. It is our intent to provide this document in accordance with the stipulations with respect to “fair use” as delineated in Copyrights - Chapter 1: Subject Matter and Scope of Copyright; Sec. 107. Limitations on exclusive rights: Fair Use. Public access to copy of this document is provided on the website of Cornell Law School at http://www4.law.cornell.edu/uscode/17/107.html and is here reproduced below: Sec. 107. - Limitations on exclusive rights: Fair Use Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrighted work, includ- ing such use by reproduction in copies or phono records or by any other means specified by that section, for purposes such as criticism, comment, news reporting, teaching (including multiple copies for class- room use), scholarship, or research, is not an infringement of copyright.
    [Show full text]
  • Musical Illusions
    Musical Illusions Diana Deutsch Department of Psychology University of California, San Diego La Jolla, CA 92093 [email protected] In Squire, L. (Ed.) New Encyclopedia of Neuroscience, (Oxford, Elsevier, in press) Author information: Name and affiliation to appear in published work: Diana Deutsch, Professor of Psychology, University of California, San Diego Full address: Professor Diana Deutsch Department of Psychology University of California, San Diego 9500 Gilman Dr. #0109 La Jolla, CA 92093-0109, USA 2 keywords and phrases for indexing: glissando illusion handendness illusion individual differences language modularity music musical illusions octave illusion perception plasticity scale illusion speech tritone paradox 3 Synopsis Musical illusions are explored, and their implications for brain function are discussed. There are striking variations across listeners in perception of these illusions. For certain illusions, perceptual differences correlate with handedness, indicating that they reflect variations in innate brain organization. For another illusion, perceptual differences correlate with the language or dialect to which the listener was exposed, particularly early in life, so pointing to an influence of early exposure to speech sounds on how music is perceived. Implications of the illusions for modularity of function are discussed. 4 Musical Illusions D Deutsch, University of California, San Diego, La Jolla, CA, USA Introduction Over the last decade, there have been significant advances in understanding the brain mechanisms underlying music perception. Functional imaging studies of normal individuals have provided considerable information concerning the anatomical structures involved. Studies of patients with musical deficits resulting from brain lesions have supplied much complementary information, as have studies of individuals with congenital amusia. Investigations of musical illusions – misperceptions of music by normal individuals – provide further insights into the brain circuitry underlying music perception.
    [Show full text]
  • Psychoacoustic Manipulation of the Sound Induced Illusory Flash
    PSYCHOACOUSTIC MANIPULATION OF THE SOUND INDUCED ILLUSORY FLASH Sonia Wilkie Catherine Stevens Roger Dean [email protected] [email protected] [email protected] MARCS Auditory Laboratories University of Western Sydney Locked Bag 1797 Penrith South 1797 Sydney, Australia ABSTRACT auditory beeps. This illusory percept appears to occur Psychological research on cross-modal perception has because of the superior resolution of the auditory system focused on the manipulation of sensory information for rhythmic perception which, in this case, overrides predominantly by visual information. There is a lacuna visual information. in using auditory stimuli to manipulate other sensory The Sound Induced Illusory Flash is a recent discov- information. The Sound Induced Illusory Flash is one ery. Whilst recent research4 5 has focused on neural illusory paradigm that uses the auditory system to bias mechanisms that underpin the illusion, only the initial 6 7 8 other sensory information. However, more research is studies … … explore basic structural variables that give needed into the different conditions under which the rise to the illusion. It is these structural variables that Sound Induced Illusory Flash manifests and is en- are of interest for further exploration of the illusion hanced or reduced. experience. Such research outcomes provide new oppor- The experiment reported here investigates the effect tunities for creative application and multimedia trans- of new auditory variables on the Sound Induced Illusory mission techniques where auditory stimuli might influ- Flash. The variables to be discussed include the use of ence visual perception in novel and interesting ways. pitch intervals and harmonic relationships.
    [Show full text]
  • Read Book Acoustics and Psychoacoustics
    ACOUSTICS AND PSYCHOACOUSTICS PDF, EPUB, EBOOK Jamie Angus,David M. Howard | 496 pages | 13 Jan 2010 | Taylor & Francis Ltd | 9780240521756 | English | Oxford, United Kingdom Acoustics and Psychoacoustics PDF Book We just haven't asked the right questions. Floyd E. The basilar membrane therefore responds best to high frequencies where it is narrow and thin at the base and to low frequencies where it is wide and thick at the apex. Welcome back. Handbook of Clinical Audiology. Sometimes it is important to be able to calculate an estimate of the equivalent sound level experienced over a period of time. In order to obtain an estimate of the sound pressure level it is necessary to average over at least one cycle, and preferably more, of the sound waveform. Suppose two pure tones, or sine waves, with amplitudes A1 and A2 and frequencies F1 and F2 respectively are sounded together. Psychoacoustics is a developing field of research. Readers should check their local regulations for noise exposure in practice. There are two different situations which must be considered when adding sound levels together. This book is not yet featured on Listopia. Firstly, we must work out the radiating area of the loudspeaker which is: 0. The delays are very small and so these effects occur at high audio frequencies, typically above 5 kHz. Ideally one would like a filter which has a fast time response and a narrow bandwidth, but this is impossible. Instead they take a finite frequency range to attenuate the signal. Automated room correction routines are more of a band-aid for flawed loudspeakers rather than an improvement for typical room acoustics.
    [Show full text]