Suburban Noise Control with Plant Materials and Solid Barriers
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Air Compressor Noise Control Air Compressor Noise Control
AIR COMPRESSOR BY NOISE CONTROL USA AIR COMPRESSOR NOISE CONTROL AIR COMPRESSOR NOISE CONTROL Compressor are often noisy an effective solution is often required to suppress the noise emitted from them. Compressor noise is usually a nuisance because they are sitting on comparatively lightweight structures. The best way to soundproof and to reduce any noise from a compressor regardless of size is to enclose it within a Floor Mounted 4-Sided Soundproofing Acoustic blanket Enclosure. For best results the enclosure should be as large as possible to allow less heat buildup and also to be more effective at reducing the noise output from reaching other areas and acoustically isolating the Compressor to contain structure borne sound being transmitted from where it is mounted. Depending on the current sound levels of the Compressor and your noise reduction goals, an abatement solution can be determined. In most applications a soundproofing blanket enclosure will meet your sound reduction needs. This is a two to four sided soundproofing enclosure with or without a roof. Typically a frame and track is constructed to suspend the soundproofing curtain panels. The soundproofing blankets material is a composite material bonding mass loaded vinyl with an acoustical absorber and faced with a vinyl diamond stitched facing. Using our Soundproofing Acoustic Blankets to construct a 4-sided noise control solution will significantly reduce sound. The noise reduction to be expected is a range of 20 to 40 decibels. The better the construction, weight of blankets and amount of soundproofing acoustic blankets used (the surface area) all factor into your sound reduction numbers. -
Realisation of the First Sub Shot Noise Wide Field Microscope
Realisation of the first sub shot noise wide field microscope Nigam Samantaray1,2, Ivano Ruo-Berchera1, Alice Meda1, , Marco Genovese1,3 1 INRIM, Strada delle Cacce 91, I-10135 Torino, ∗Italy 2 Politecnico di Torino, Corso Duca degli Abruzzi, 24 - I-10129 Torino, Italy and 3 INFN, Via P. Giuria 1, I-10125 Torino, Italy ∗ ∗ Correspondence: Alice Meda, Email: [email protected], Tel: +390113919245 In the last years several proof of principle experiments have demonstrated the advantages of quantum technologies respect to classical schemes. The present challenge is to overpass the limits of proof of principle demonstrations to approach real applications. This letter presents such an achievement in the field of quantum enhanced imaging. In particular, we describe the realization of a sub-shot noise wide field microscope based on spatially multi-mode non-classical photon number correlations in twin beams. The microscope produces real time images of 8000 pixels at full resolution, for (500µm)2 field-of-view, with noise reduced to the 80% of the shot noise level (for each pixel), suitable for absorption imaging of complex structures. By fast post-elaboration, specifically applying a quantum enhanced median filter, the noise can be further reduced (less than 30% of the shot noise level) by setting a trade-off with the resolution, demonstrating the best sensitivity per incident photon ever achieved in absorption microscopy. Keywords: imaging, sub shot noise, microscopy, parametric down conversion 1 INTRODUCTION Sensitivity in standard optical imaging and sensing, the ones exploiting classical illuminating fields, is fundamentally lower bounded by the shot noise, the inverse square root of the number of photons used. -
Construction Noise Control Products and Vendors Guidance Sheet
Construction Noise Control Products and Vendors Guidance Sheet Revised: 16 July 2018 Distributed by: New York City Department of Environmental Protection (NYC DEP) The following is intended to provide guidance to construction contractors with respect to finding and selecting suitable construction noise control products. These products and vendors may be helpful to contractors for achieving compliance with the New York City Noise Code, and more specifically, with the Construction Noise Rules found in Local Law 113, Section 24-219, Chapter 28, Title 15 of the Rules of New York City which went into effect in July 2007. While there are similarities in the approach to construction noise control for all work sites, the specific measures and solutions need to be carefully selected and implemented correctly. In general, noise control measures can be applied at the noise source, along the pathway, or at the receiver (listener) directly. For these reasons, it is highly recommended that contractors discuss their situation with a qualified acoustical consultant as early as possible. It is always more cost-effective to design for good acoustics from the beginning rather than to rely on retrofit solutions when noise becomes a problem later. To aid in the selection of an acoustical consultant, links to several national professional societies are provided. The NYC DEP can also provide a list of consultants. This information is not an exhaustive list of noise control products and vendors. It is intended for guidance and informative purposes only, and should not be construed as an official endorsement of any product, vendor, or consultant by the City of New York. -
Noise Reduction Technologies for Turbofan Engines
NASA/TM—2007-214495 Noise Reduction Technologies for Turbofan Engines Dennis L. Huff Glenn Research Center, Cleveland, Ohio September 2007 NASA STI Program . in Profile Since its founding, NASA has been dedicated to the • CONFERENCE PUBLICATION. Collected advancement of aeronautics and space science. The papers from scientific and technical NASA Scientific and Technical Information (STI) conferences, symposia, seminars, or other program plays a key part in helping NASA maintain meetings sponsored or cosponsored by NASA. this important role. • SPECIAL PUBLICATION. Scientific, The NASA STI Program operates under the auspices technical, or historical information from of the Agency Chief Information Officer. It collects, NASA programs, projects, and missions, often organizes, provides for archiving, and disseminates concerned with subjects having substantial NASA’s STI. The NASA STI program provides access public interest. to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Reports Server, • TECHNICAL TRANSLATION. English- thus providing one of the largest collections of language translations of foreign scientific and aeronautical and space science STI in the world. technical material pertinent to NASA’s mission. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which Specialized services also include creating custom includes the following report types: thesauri, building customized databases, organizing and publishing research results. • TECHNICAL PUBLICATION. Reports of completed research or a major significant phase For more information about the NASA STI of research that present the results of NASA program, see the following: programs and include extensive data or theoretical analysis. Includes compilations of significant • Access the NASA STI program home page at scientific and technical data and information http://www.sti.nasa.gov deemed to be of continuing reference value. -
Advanced Air and Noise Pollution Control VOLUME 2 HANDBOOK of ENVIRONMENTAL ENGINEERING
Advanced Air and Noise Pollution Control VOLUME 2 HANDBOOK OF ENVIRONMENTAL ENGINEERING Advanced Air and Noise Pollution Control Edited by Lawrence K. Wang, PhD, PE, DEE Zorex Corporation, Newtonville, NY Lenox Institute of Water Technology, Lenox, MA Krofta Engineering Corp., Lenox, MA Norman C. Pereira, PhD Monsanto Corporation (Retired), St. Louis, MO Yung-Tse Hung, PhD, PE, DEE Department of Civil and Environmental Engineering Cleveland State University, Cleveland, OH Consulting Editor Kathleen Hung Li, MS © 2005 Humana Press Inc. 999 Riverview Drive, Suite 208 Totowa, New Jersey 07512 humanapress.com All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise without written permission from the Publisher. All authored papers, comments, opinions, conclusions, or recommendations are those of the author(s), and do not necessarily reflect the views of the publisher. For additional copies, pricing for bulk purchases, and/or information about other Humana titles, contact Humana at the above address or at any of the following numbers: Tel.: 973-256-1699; Fax: 973-256-8341; E-mail: [email protected] This publication is printed on acid-free paper. h ANSI Z39.48-1984 (American Standards Institute) Permanence of Paper for Printed Library Materials. Cover design by Patricia F. Cleary. Photocopy Authorization Policy: Authorization to photocopy items for internal or personal use, or the internal or personal use of specific clients, is granted by Humana Press Inc., provided that the base fee of US $25.00 is paid directly to the Copyright Clearance Center at 222 Rosewood Drive, Danvers, MA 01923. -
Journey to a Quiet Night
QUIET NIGHT TOOLKIT Journey to a Quiet Night Strategies to Reduce Hospital Noise and Promote Healing Patient responses to the HCAHPS survey of experience consistently identify noise at night as a dissatisfier in their hospital stay. Only 51% of patients surveyed following discharge from a California hospital report that their hospital room was always quiet at night, compared to 62% of patients nationally. Noise at night is our greatest challenge to create a healing environment of care. Hospitals that have successfully improved this dimension of care have used a few common strategies: informed staff behavior modification, mechanical noise mitigation, environmental noise mitigation, and real time data to drive changes. Drivers for Improvement in Hospital Noise • Educate staff about effects of noise on patient healing Informed Behavior • Engage staff in remediation plan development Modifi cation • Monitor noise in real time HCAHPS Score for “Always Quiet at Night” • “Quiet kits” for patients Mechanical above national average of • Equipment repair Mitigation • Noise absorbing panels or curtains in high traffi c areas AIM • Establish “quiet hours” Environmental 62% • Visual cues, such as signs and dimmed lights at night in patient care areas Mitigation • Utilize white noise options Real Time • Develop system of real time alerts based on patient/family input/feedback Data Learning • Real time reporting mechanism with feedback loop Informed behavior Modifi cation As health care providers, it is imperative that we understand and help to provide our patients with an environment that is optimized for healing. Staff members must be educated about the effects that noise from talking, equipment and other activities has on patients’ healing in the hospital. -
Reducing Exposure to Lead and Noise at Indoor Firing Ranges
Reducing Exposure to Lead and Noise at Indoor Firing Ranges Several studies of firing ranges have shown that exposure to lead and noise Summary can cause health problems associated Workers and users of indoor with lead exposure and hearing loss, firing ranges may be exposed particularly among employees and in- to hazardous levels of lead and structors. Lead exposure occurs main- noise. The National Institute ly through inhalation of lead fumes or for Occupational Safety and ingestion (e.g., eating or drinking with Health (NIOSH) recommends contaminated hands) (see Figure 2) steps for workers and employ- [NIOSH 2009]. ers to reduce exposures. Exposure Limits Description of Lead Exposure OSHA has established limits for air- borne exposure to lead (see 29 CFR According to the Bureau of Justice Figure 1. Law enforcement officers 1910.1025*). The standard creates during shooting practice. Statistics, more than 1 million Fed- the action level and the permissi- eral, State, and local law enforce- ble exposure limit (PEL). The action ment officers work in the United below 60 µg lead/100g of whole blood level for airborne lead exposure is 30 [NIOSH 2009]. States [DOJ 2004]. They are re- micrograms per cubic meter of air quired to train regularly in the use of (µg/m3) as an 8-hour time weighted firearms. Indoor firing ranges are -of average (TWA). The OSHA PEL for Noise ten used because of their controlled airborne exposure to lead is 50 µg/m3 conditions (see Figure 1). In addition as an 8-hour TWA, which is reduced For noise exposure, the OSHA lim- to workers, more than 20 million ac- for shifts longer than 8 hours. -
Technical Guide For: Noise Control – Engineering Controls, Work Practices, & Administrative Controls
Technical Guide for: Noise Control – Engineering Controls, Work Practices, & Administrative Controls Table of Contents Noise Control Basics ..................................................................................................................................... 2 There are four basic principles of noise control: ........................................................................................... 2 Noise controls from OTI class 521 ............................................................................................................... 3 Noise controls from NIOSH ......................................................................................................................... 7 Noise Control: A guide for workers and employers ................................................................................... 13 Case Studies of Successful Engineering Control and Work Practices ...................................................... 138 Pallet Manufacturer Noise Controls Case Study ................................................................................... 138 Pallet Disassembly & Repair Facility Noise Controls Case Study ....................................................... 145 Metal Recycler Shaker Table Noise Controls Case Study .................................................................... 157 Case Study – Vacuum Pump Noise ...................................................................................................... 160 Edge Bander and Wood Grinder Noise Control Case Study ............................................................... -
Effect of Noise Type and Signal-To-Noise Ratio on the Effectiveness of Noise Reduction Algorithm in Hearing Aids: an Acoustical Perspective
Global Journal of Otolaryngology ISSN 2474-7556 Research Article Glob J Otolaryngol - Volume 5 Issue 2 March 2017 Copyright © All rights are reserved by Sharath Kumar KS DOI: 10.19080/GJO.2017.05.555658 Effect of Noise Type and Signal-to-Noise Ratio on the Effectiveness of Noise Reduction Algorithm in Hearing Aids: An Acoustical Perspective Sharath Kumar KS* and Manjula P Department of Audiology, All India Institute of Speech and Hearing (AIISH), University of Mysuru, India Submission: March 05, 2016; Published: March 16, 2017 *Corresponding author: Sharath Kumar KS, Department of Audiology (New JC block), Manasagangotri, AIISH, Mysuru - 570 006, Karnataka, India, Tel: ; Email: Second author: Manjula P, Professor of Audiology, Department of Audiology, Manasagangotri, AIISH, Mysuru - 570 006 India, Karnataka, Tel: ; Email: Abstract Purpose: acoustical measures. The study evaluated factors that influence the effectiveness of noise reduction (NR) algorithm in hearing aids, through Methods: Factorial design was employed. Study sample: The output from hearing aid, with and without NR at three signal-to-noise Qualityratios (SNR) (PESQ). with five types of noise, was recorded. The effect of noise reduction was studied through objective measures such as Waveform Amplitude Distribution Analysis - Signal-to-Noise Ratio (WADA-SNR), Envelope Difference Index (EDI), and Perceptual Evaluation of Speech Results: The results revealed that when NR was enabled, it was effective in reducing the noise. However, when speech was presented in the presenceConclusion: of noise, the NR was effective in enhancing certain acoustic parameters of speech; like signal-to-noise ratio and envelope. changes in the output of the hearing aid with and without NR processing. -
Dust and Noise Environmental Impact Assessment and Control in Serbian Mining Practice
minerals Article Dust and Noise Environmental Impact Assessment and Control in Serbian Mining Practice Nikola Lilic *, Aleksandar Cvjetic, Dinko Knezevic, Vladimir Milisavljevic and Uros Pantelic Faculty of Mining and Geology, University of Belgrade, Djusina 7, 11000 Belgrade, Serbia; [email protected] (A.C.); [email protected] (D.K.); [email protected] (V.M.); [email protected] (U.P.) * Correspondence: [email protected]; Tel.: +381-11-321-9131 Received: 30 November 2017; Accepted: 15 January 2018; Published: 23 January 2018 Abstract: This paper presents an approach to dust and noise environmental impact assessment and control in Serbian mine planning theory and practice. Mine planning defines the model of mining operations, production and processing rates, and ore excavation and dumping scheduling, including spatial positioning for all these activities. The planning process then needs to assess the impact of these mining activities on environmental quality. This task can be successfully completed with contemporary models for assessment of suspended particles dispersion and noise propagation. In addition to that, this approach enables verification of the efficiency of suggested protection measures for reduction or elimination of identified impact. A case study of dust and noise management at the Bor copper mine is presented, including the analysis of the efficiency of planned protection measures from dust and noise, within long-term mine planning at the Veliki Krivelj and Cerovo open pits of the Bor copper mine. Keywords: dust and noise impact assessment and control; air dispersion modeling; AERMOD; noise mapping; SoundPLAN; mine planning 1. -
EPA 450/2-77-022 Control of Volatile Organic Emissions from Solvent Metal Cleaning
EPA-450/2-77-022 November 1977 (OAQPS NO. 1.2-079) OAQPS GUIDELINES CONTROL OF VOLATILE ORGANIC EMISSIONS FROM SOLVENT METAL CLEANING I U.S. ENVIRONMENTAL PROTECTION AGENCY 1 Office of Air and Waste Management Office of Air Quality Planning and Standards I,\ a0- Research Triangle Park, North Carolina 2771 1 328 1 I, RADIAN LIBRARY DURHAM, N.C. II i. This report is issued by the Environmental Protection Agency to report technical data of interest to a limited number of readers. Copies are available free of charge to Federal employees, current contractors anc! grantees, and nonprofit organizations - in limited quantities - from the Library Services Office (MD-35). Research Triangle Park, North Carolina 27711; or, for a fee, from the National Technical Information Service, 5285 Port Royal Road, Springfield, Virginia 22161. Publ ication No. EPA-45012-77-022 PREFACE The purpose of this document is to inform regional, State, and local air pol 1ution control agencies of the different techniques available for reducing organic emissions from solvent metal cleaning (degreasing) . Solvent metal cleaning includes the use of equipment from any of three broad categories: cold cleaners , open top vapor degreasers , and conveyori zed degreasers. A1 1 of these employ organic solvents to remove soluble impurities from metal surfaces. The diversity in designs and applications of degreasers make an emission 1imi t approach inappropriate; rather, regulations based on equipment specifications and operating requirements are recomnended. Reasonably available control technology (RACT) for these sources entails implementation of operating procedures which minimize solvent bss and retrofit of applicable control devices. Required control equipment can be as simple as a manual cover or as complex as a carbon adsorption system, depending on the size and design of the degreaser. -
Quietzone® Quietzone® Acoustic Batts Acoustic Batts
QuietZone® QuietZone® Acoustic Batts Acoustic Batts Product Data Sheet Product Data Sheet Sliding doors should be avoided Owens Corning offers a variety • Uniform Building Code (ICBO) performance desired. The STC • Lightweight and pre-cut where optimum noise control of duct systems, wraps and liners building types III, IV, and V performance data for various wall to 93" or 105" lengths for is desired. Doors opening on that effectively reduce noise. constructions can be found on quick installation and hallways should not open across • National Building Code pages 3 and 4. easy transportation. from one another. Fire Safety (BOCA) building types Kraft facing will burn. Do not 3, 4, and 5 Durable Composition • Faced batts are easily identifi ed Electrical leave exposed. Facing must be QuietZone acoustic batts: by attractive, PINK-kraft facing Light switches and outlets should • Standard Building Code featuring large images of the installed in substantial contact (SBCCI) building types • Are dimensionally stable. not be located back-to-back. with an approved ceiling, fl oor PINK PANTHER™. Ceiling fi xtures should be surface III, V, and VI. or wall material. Keep open • Will not slump over time. • Easily stapled and cleanly mounted and openings around fl ame and other heat sources Always check with your local boxes should be sealed airtight. • Are composed of inorganic fabricated to allow for away from facing. Do not place building code offi cial regarding improved workmanship and insulation within 3” of light local requirements affecting glass fi bers which do not Circuit breaker boxes, telephone absorb water. acoustical performance. outlets and intercom systems fi xtures or similar electrical installation of all building devices unless device is labeled should be located on well- components.