Sounds of Science – Schall Im Labor (1800–1930)
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ACT Resources for Arts A/V Technology
Career Cluster: Arts, A/V Technology, & Communications Mathematics in Digital Arts and Design III – Addresses standard 11 Question A graphic designer at a bottling company is tasked with designing efficient packaging for soda cans. Two options are being considered. Which of the two arrangements has less unused space in the package and how does the arrangement compare with the alternative? The radius of a soda can is approximately 3.2 cm. Package A Package B A. Package A; Package A has 16.7% less unused space than Package B. B. Package B; Package B has 16.7% less unused space than Package A. C. Package B; Package B has 8.3% less unused space than Package A. D. Neither; The two packages have equal unused space. Source: Adapted from Zordak, S. E. (n.d.). Soda Cans. Retrieved February 24, 2016, from http://illuminations.nctm.org/Lesson.aspx?id=2363 Office of Career and Technical Education • 710 James Robertson Parkway • Nashville, TN 37243 1 | March 2016 Tel: (615) 532-2830 • tn.gov/education/cte Career Cluster: Arts, A/V Technology, & Communications Science in A/V Production I – Addresses Standard 15 Passage I Natural Science: This passage is adapted from the chapter “The Wave Theory of Sound” in Acoustics: An Introduction to Its Physical Principles and Applications by Allan Pierce. (Acoustical Society of America). Acoustics is the science of sound, including 20 ability, of communication via sound, along with the its production, transmission, and effects. In variety of psychological influences sound has on present usage, the term sound implies not only those who hear it. -
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Hashimoto and Sumita Earth, Planets and Space (2021) 73:143 https://doi.org/10.1186/s40623-021-01472-7 FULL PAPER Open Access Excitation of airwaves by bubble bursting in suspensions : regime transitions and implications for basaltic volcanic eruptions Kana Hashimoto and Ikuro Sumita* Abstract Basaltic magma becomes more viscous, solid-like (elastic), and non-Newtonian (shear-thinning, non-zero yield stress) as its crystal content increases. However, the rheological efects on bubble bursting and airwave excitation are poorly understood. Here we conduct laboratory experiments to investigate these efects by injecting a bubble of volume V into a refractive index-matched suspension consisting of non-Brownian particles (volumetric fraction φ ) and a Newtonian liquid. We show that depending on φ and V, airwaves with diverse waveforms are excited, covering a frequency band of f = O(10 − 104) Hz. In a suspension of φ ≤ 0.3 or in a suspension of φ = 0.4 with a V smaller than critical, the bubble bursts after it forms a hemispherical cap at the surface and excites a high-frequency (HF) wave (f ∼ 1 − 2 × 104 Hz) with an irregular waveform, which likely originates from flm vibration. However, in a suspension of φ = 0.4 and with a V larger than critical, the bubble bursts as soon as it protrudes above the surface, and its aper- ture opens slowly, exciting Helmholtz resonance with f = O(103) Hz. Superimposed on the waveform are an HF wave component excited upon bursting and a low-frequency (f = O(10) Hz) air fow vented from the defating bubble, which becomes dominant at a large V. -
Marin Mersenne English Version
MARIN MERSENNE (September 8, 1588 – September 1, 1648) by HEINZ KLAUS STRICK, Germany Although no stamp with a portrait of the French mathematician MARIN MERSENNE has yet been issued, the postal administration of the Principality of Liechtenstein took the discovery of the 39th MERSENNE prime number = 13,466,917 − M13,466,9 17 2 1 as an opportunity to select this number as the motif for a stamp of a series on science (the graphic on the stamp below shows a logarithmic spiral). (drawings © Andreas Strick) EUCLID had already dealt with numbers of the type 2n −1 and, among other things, proved the theorem: If 2n −1 is a prime number, then 2n1- ⋅ (2 n − 1) is a perfect number. th Until the end of the 16 century it was believed that all numbers of the type 2n −1 were prime numbers if the exponent n was a prime number. In 1603, the Italian mathematician PIETRO CATALDI, who was also the first to write a treatise on continued fractions, proved the following: If the exponent n is not a prime number, i.e. if it can be represented as the product of n a⋅ b= with a b∈ , IN , then 2n −1 is not a prime number either; because then the number can be broken down into at least two factors: ⋅ − ⋅ 2a b − 12112 =( a −) ⋅( +a + 22 a + 23 a + ...2 + (b 1) a ). He also showed by systematic trial and error with all prime divisors up to the root of the number in question that 217 −1 and 219 −1 are prime numbers. -
The Influence of Characteristics on Music Enjoyment and Preference
Page 12 Oshkosh Scholar The Influence of Characteristics on Music Enjoyment and Preference Kristie Wirth, author Dr. Quin Chrobak, Psychology, faculty mentor Kristie Wirth is a senior at UW Oshkosh studying psychology and French. She plans to pursue a Ph.D. in counseling psychology after graduating. Her ideal career would involve both teaching and counseling at a university. She conducted the following research study as part of the McNair Scholars Program during spring 2012. Dr. Quin Chrobak received his B.A. from Drew University, his M.A. from American University, and his Ph.D. in experimental psychology from Kent State University. His research focuses on understanding how memory and cognition operate in complex real-world situations. Most recently, his research has begun to explore the notion that the nature of the relationship between witnessed and suggested/fabricated events may contribute to the false memory development. Abstract Past research has indicated that two specific personality traits, openness and empathy, may contribute to greater enjoyment of music that expresses negative emotions. Individuals with elevated levels of depressive symptoms may similarly have a preference for negative music. However, no research to date has explored the impact of both personality traits and depressive symptoms in the same investigation. The current study measured both music enjoyment (how much people like certain music) and music preference (how often people choose to listen to certain music) after exposure to negative, neutral, and positive music. Supporting prior research, this study indicated that individuals high in overall empathy (the ability to experience the emotions of another) had a greater enjoyment of negative emotional music. -
Questions: Helmholtz Resonance
Questions: Helmholtz resonance 1 Helmholtz resonance may occur when an enclosed volume of air is connected to the atmosphere by a short exit pipe when simple harmonic oscillations of air in the pipe are driven by pressure changes in the enclosed volume. The frequency of the resonance is given by … 1/2 f = v/2[Ax/VL] … where v is the velocity of sound in air, V is the volume of air enclosed air, Ax is the cross sectional area and L is the effective length of the pipe. a Explain, in physical terms, why the effective length L in the frequency relationship is a little longer than the actual length of the exit pipe. b Explain, in physical terms, why halving the volume of the enclosed air raises the resonant frequency. c A Helmholtz resonator is completely filled with carbon dioxide. Will the resonant frequency change and if so by how much? 2 A empty coffee container is shown. The round hole in the cap has a diameter of 1.45 cm. Short lengths of plastic pipe with an internal radius of 0.65 cm convert the container into a Helmholtz resonator. Measured resonant frequencies are plotted below against frequencies 1/2 calculated with the Helmholtz relationship f = v/2[Ax/VL] for four pipe lengths. a Are calculations less satisfactory for shorter or longer pipe lengths? b Increasing the effective length of the pipe by 1.3 cm, recalculating and plotting the revised data gives the graph below. c Which additional point on the graph represents the resonance when the pipe length is zero? d The sound box on a guitar is said to behave as Helmholtz resonator with an effective pipe length. -
Acoustic Resonance Lab 1 Introduction 2 Sound Generation
Summer Music Technology 2013 Acoustic Resonance Lab 1 Introduction This activity introduces several concepts that are fundamental to understanding how sound is produced in musical instruments. We'll be measuring audio produced from acoustic tubes. General Notes • Work in groups of 2 or 3 • Divide up the tasks amongst your group members so everyone contributes Equipment Check Make sure you have the following: • (2) iPads • (1) Microphone • (1) Tape Measure • (1) Adjustable PVC tube with speaker • (1) Amplifier • (1) RCA to 1/8" audio cable • (1) iRig Pre-Amp • (2) Pieces of speaker wire • (1) XLR cable • (1) Pair of Alligator clips 2 Sound Generation Setup We will use one iPad to generate tones that will play through our tube. However, the iPad can't provide enough power to drive the speaker, so we need to connect it to an amplifier. From here on, we'll refer to this iPad as the Synthesizer. 1. Plug the Amplifier’s power cord into an outlet. DO NOT TURN IT ON. 2. Plug one end of the 1/8" audio cable to the iPad's headphone output jack. Plug the other end into the Amplifier’s Input jack. 3. Attach the alligator clips to the speaker wires on the Amplifier’s Output jack. Attach the other end of the clips to the speaker terminals (the speaker should be mounted to the tube). MET-lab 1 Drexel University Summer Music Technology 2013 3 Sound Analysis Setup In order to measure the audio, we need to record audio from a microphone. The other iPad will be used to record sound. -
Karlheinz Stockhausen: Works for Ensemble English
composed 137 works for ensemble (2 players or more) from 1950 to 2007. SCORES , compact discs, books , posters, videos, music boxes may be ordered directly from the Stockhausen-Verlag . A complete list of Stockhausen ’s works and CDs is available free of charge from the Stockhausen-Verlag , Kettenberg 15, 51515 Kürten, Germany (Fax: +49 [0 ] 2268-1813; e-mail [email protected]) www.stockhausen.org Karlheinz Stockhausen Works for ensemble (2 players or more) (Among these works for more than 18 players which are usu al ly not per formed by orches tras, but rath er by cham ber ensem bles such as the Lon don Sin fo niet ta , the Ensem ble Inter con tem po rain , the Asko Ensem ble , or Ensem ble Mod ern .) All works which were composed until 1969 (work numbers ¿ to 29) are pub lished by Uni ver sal Edi tion in Vien na, with the excep tion of ETUDE, Elec tron ic STUD IES I and II, GESANG DER JÜNGLINGE , KON TAKTE, MOMENTE, and HYM NEN , which are pub lished since 1993 by the Stock hau sen -Ver lag , and the renewed compositions 3x REFRAIN 2000, MIXTURE 2003, STOP and START. Start ing with work num ber 30, all com po si tions are pub lished by the Stock hau sen -Ver lag , Ket ten berg 15, 51515 Kürten, Ger ma ny, and may be ordered di rect ly. [9 ’21”] = dura tion of 9 min utes and 21 sec onds (dura tions with min utes and sec onds: CD dura tions of the Com plete Edi tion ). -
Significance of Beating Observed in Earthquake Responses of Buildings
SIGNIFICANCE OF BEATING OBSERVED IN EARTHQUAKE RESPONSES OF BUILDINGS Mehmet Çelebi1, S. Farid Ghahari2, and Ertuğrul Taciroǧlu2 U.S. Geological Survey1 and University of California, Los Angeles2 Menlo Park, California, USA1 and Los Angeles, California, USA2 Abstract The beating phenomenon observed in the recorded responses of a tall building in Japan and another in the U.S. are examined in this paper. Beating is a periodic vibrational behavior caused by distinctive coupling between translational and torsional modes that typically have close frequencies. Beating is prominent in the prolonged resonant responses of lightly damped structures. Resonances caused by site effects also contribute to accentuating the beating effect. Spectral analyses and system identification techniques are used herein to quantify the periods and amplitudes of the beating effects from the strong motion recordings of the two buildings. Quantification of beating effects is a first step towards determining remedial actions to improve resilient building performance to strong earthquake induced shaking. Introduction In a cursory survey of several textbooks on structural dynamics, it can be seen that beating effects have not been included in their scopes. On the other hand, as more earthquake response records from instrumented buildings became available, it also became evident that the beating phenomenon is common. As modern digital equipment routinely provide recordings of prolonged responses of structures, we were prompted to visit the subject of beating, since such response characteristics may impact the instantaneous and long-term shaking performances of buildings during large or small earthquakes. The main purpose in deploying seismic instruments in buildings (and other structures) is to record their responses during seismic events to facilitate studies understanding and assessing their behavior and performances during and future strong shaking events. -
Echo Eliminator Ceiling & Wall Panels
Echo Eliminator Ceiling & Wall Panels Echo Eliminator, or Bonded Acoustical Cotton (B.A.C.), is the most cost-effective acoustical absorbing material on the market. It is a high-performance panel manufactured from recycled cotton, and is ideal for noise control applications. Echo Eliminator can easily be installed as acoustical wall panels or hanging baffles. • No VOCs (Volatile Organic Compounds) • No formaldehyde, requires no warning labels • Fungi-, mold-, and mildew-resistant • Class A Fire Rated (Non-flammable per ASTM E-84) ACOUSTICAL SURFACES, INC. CELEBRATING 35 YEARS – SOUNDPROOFING, ACOUSTICS, NOISE & VIBRATION SPECIALISTS! ™ 952.448.5300 • 800.448.0121 • [email protected] • www.acousticalsurfaces.com Echo Eliminator APPLICATIONS Residential, commercial, industrial; schools, restaurants, classrooms, Ceiling & Wall Panels houses of worship, community centers, offices, conference rooms, music rooms, recording studios, theaters, public spaces, medical facilities, audi- toriums, arenas/stadiums, warehouses, manufacturing plants, and more. Acoustics and Expected Performance: Absorbing sound and reducing echo / reverberation can be challeng- ing. Echo Eliminator offers a high Noise Reduction Coefficient (NRC) to reduce the amount of sound within a room. One-inch thick panels are appropriate for areas wher e the main issue is understanding speech. Rooms with more mid-and-low frequency noise, or where music is present, benefit from using two-inch thick panels. SIZES & OPTIONS Standard Size: 24" x 48" (minimum quantities apply, call for details); options: 12" x 12", 24" x 24", 48" x 48", 48" x 96". Note: All sizes are nominal and subject to manufacturing tolerances that may vary +/- 1/8". Thickness/Density: 1" thick / 3 lb. per cubic foot (pcf); 1" thick/6 lb. -
Effects of Learning on Dissonance Judgments
journal of interdisciplinary music studies 2014-2016, volume 8, issue 1&2, art. #16081201, pp. 11-28 open peer commentary article Effects of learning on dissonance judgments Diana Omigie1,2,3,4, Delphine Dellacherie 1,5 and Séverine Samson1,2 1UFR de Psychologie, Laboratoire PSITEC-EA 4072, Université de Lille 2 Hôpital de la Pitié-Salpêtrière, Paris 3 Centre de Neuroimagerie de Recherche - CENIR, 7-75013 Paris, 4 Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière - ICM, F-75013, Paris 5 Unité de Neuropediatrie, Centre Hospitalier Régional Universitaire, Lille Background in music cognition: A frequently posed question regards the origins of the aversion most listeners have to dissonant sounds. In the domain of psychology, attempts to address this question have included examining how early similar biases may be found in infants as well as whether they exist at all in non-human species. In contrast, another line of work has, rather than focusing on potential biological predispositions, examined the specific role that musical exposure and training may play in driving emotional judgments of dissonance. Background in music history: Speculation as to why consonant sounds are preferred to dissonant sounds dates back many centuries to the ancient Greek notion that beauty is intrinsically related to proportions. More recently, the prevailing theory is that sensory dissonance arises as a result of mechanical interference within the organ of hearing, although another plausible theory states that consonance preferences are driven by a preference for harmonicity. Aims: The current review aims to re-examine the direct evidence that may be found for a role of learning mechanisms in dissonance processing, and in doing so inform theories of dissonance perception. -
Gestalt Psychology and the Anti-Metaphysical Project of the Aufbau
Science and Experience/ Science of Experience: Gestalt Psychology and the Anti-Metaphysical Project of the Aufbau Uljana Feest Technische Universität Berlin This paper investigates the way in which Rudolf Carnap drew on Gestalt psychological notions when deªning the basic elements of his constitutional system. I argue that while Carnap’s conceptualization of basic experience was compatible with ideas articulated by members of the Berlin/Frankfurt school of Gestalt psychology, his formal analysis of the relationship between two ba- sic experiences (“recollection of similarity”) was not. This is consistent, given that Carnap’s aim was to provide a uniªed reconstruction of scientiªc knowl- edge, as opposed to the mental processes by which we gain knowledge about the world. It is this last point that put him in marked contrast to some of the older epistemological literature, which he cited when pointing to the complex character of basic experience. While this literature had the explicit goal of overcoming metaphysical presuppositions by means of an analysis of conscious- ness, Carnap viewed these attempts as still carrying metaphysical baggage. By choosing the autopsychological basis, he expressed his intellectual depth to their antimetaphysical impetus. By insisting on the metaphysical neutrality of his system, he emphasized that he was carrying out a project in which they had not succeeded. 1. Introduction In his 1928 book, Der Logische Aufbau der Welt, Rudolf Carnap presented what he called a “constructional system” (Carnap 1967). The aim of this system was to demonstrate that all of our scientiªc concepts are logically derivable from more “basic” concepts in a hierarchical fashion. -
L Atdment OFFICF QO9ENT ROOM 36
*;JiQYL~dW~llbk~ieira - - ~-- -, - ., · LAtDMENT OFFICF QO9ENT ROOM 36 ?ESEARC L0ORATORY OF RL C.f:'__ . /j16baV"BLI:1!S INSTITUTE 0i'7Cn' / PERCEPTION OF MUSICAL INTERVALS: EVIDENCE FOR THE CENTRAL ORIGIN OF THE PITCH OF COMPLEX TONES ADRIANUS J. M. HOUTSMA JULIUS L. GOLDSTEIN LO N OPY TECHNICAL REPORT 484 OCTOBER I, 1971 MASSACHUSETTS INSTITUTE OF TECHNOLOGY RESEARCH LABORATORY OF ELECTRONICS CAMBRIDGE, MASSACHUSETTS 02139 The Research Laboratory of Electronics is an interdepartmental laboratory in which faculty members and graduate students from numerous academic departments conduct research. The research reported in this document was made possible in part by support extended the Massachusetts Institute of Tech- nology, Research Laboratory of Electronics, by the JOINT SER- VICES ELECTRONICS PROGRAMS (U. S. Army, U. S. Navy, and U.S. Air Force) under Contract No. DAAB07-71-C-0300, and by the National Institutes of Health (Grant 5 PO1 GM14940-05). Requestors having DOD contracts or grants should apply for copies of technical reports to the Defense Documentation Center, Cameron Station, Alexandria, Virginia 22314; all others should apply to the Clearinghouse for Federal Scientific and Technical Information, Sills Building, 5285 Port Royal Road, Springfield, Virginia 22151. THIS DOCUMENT HAS BEEN APPROVED FOR PUBLIC RELEASE AND SALE; ITS DISTRIBUTION IS UNLIMITED. MASSACHUSETTS INSTITUTE OF TECHNOLOGY RESEARCH LABORATORY OF ELECTRONICS Technical Report 484 October 1, 1971 PERCEPTION OF MUSICAL INTERVALS: EVIDENCE FOR THE CENTRAL ORIGIN OF COMPLEX TONES Adrianus J. M. Houtsma and Julius L. Goldstein This report is based on a thesis by A. J. M. Houtsma submitted to the Department of Electrical Engineering at the Massachusetts Institute of Technology, June 1971, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.