Results 241 to 250 of about 3,712,884 (293)
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The Journal of the Acoustical Society of America, 1974
A low-cost device has been built for obtaining a histogram of community noise levels. Signals from a sound level meter or tape recorder are appropriately rectified and level sensed by ten comparators. From the output of the comparators and a logic network, currents are furnished to a bank of electrolytic storage cells, known as E-cells.
Bill D. Cook, Lawrence I. Farley
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A low-cost device has been built for obtaining a histogram of community noise levels. Signals from a sound level meter or tape recorder are appropriately rectified and level sensed by ten comparators. From the output of the comparators and a logic network, currents are furnished to a bank of electrolytic storage cells, known as E-cells.
Bill D. Cook, Lawrence I. Farley
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The Journal of the Acoustical Society of America, 1982
An apparatus for monitoring the noise which impinges a human ear and for generating a signal representing the noise level accumulated over a period of time. Typically, the apparatus can be located in a hearing protector worn by a worker in a noisy environment.
Sue A. Evans, Clarence L. Rogers
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An apparatus for monitoring the noise which impinges a human ear and for generating a signal representing the noise level accumulated over a period of time. Typically, the apparatus can be located in a hearing protector worn by a worker in a noisy environment.
Sue A. Evans, Clarence L. Rogers
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2020
Today, noise is one of the burning issues affecting the overall quality of everyday life. In order to address the aforementioned issue this book chapter offers an overview of several methods designed to monitor noise pollution in urban areas. In the process of creating cities’ noise maps the traditional measuring methods typically use expensive and ...
Đurek, Ivan +3 more
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Today, noise is one of the burning issues affecting the overall quality of everyday life. In order to address the aforementioned issue this book chapter offers an overview of several methods designed to monitor noise pollution in urban areas. In the process of creating cities’ noise maps the traditional measuring methods typically use expensive and ...
Đurek, Ivan +3 more
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Journal of the American Institute of Planners, 1974
Abstract In this article the significance and requirements of monitoring outdoor noise pollution in urban environments are discussed. Potentialities and limitations of using the regular telephone network for this purpose are identified. A system of noise monitoring is described which uses single telephone lines and existing electronic and data ...
Melville C. Branch +2 more
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Abstract In this article the significance and requirements of monitoring outdoor noise pollution in urban environments are discussed. Potentialities and limitations of using the regular telephone network for this purpose are identified. A system of noise monitoring is described which uses single telephone lines and existing electronic and data ...
Melville C. Branch +2 more
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The Journal of the Acoustical Society of America, 1974
An environmental noise monitor has been designed, constructed, and tested for the U. S. Environmental Protection Agency. The system includes a Brüel & Kjaer 4921 outdoor microphone system, a Wang 600-14 computing calculator as the digital controller and statistical analyzer, and a Nagra SJ tape recorder for analog recording.
P. D. Schomer, A. Konheim
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An environmental noise monitor has been designed, constructed, and tested for the U. S. Environmental Protection Agency. The system includes a Brüel & Kjaer 4921 outdoor microphone system, a Wang 600-14 computing calculator as the digital controller and statistical analyzer, and a Nagra SJ tape recorder for analog recording.
P. D. Schomer, A. Konheim
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Aircraft Engineering and Aerospace Technology, 1979
Although it has been generally accepted that noise control is of great importance around airports, little consideration has been given to the instrumentation concept. The purpose of this article is to discuss various requirements to noise monitoring systems with respect to flexibility, reliability and operation.
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Although it has been generally accepted that noise control is of great importance around airports, little consideration has been given to the instrumentation concept. The purpose of this article is to discuss various requirements to noise monitoring systems with respect to flexibility, reliability and operation.
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The Journal of the Acoustical Society of America, 2005
A noise monitor for transmitting an actual sound (noise) when the noise level becomes higher than a regulation standard. In each noise detecting unit, the level of noise is measured through a microphone and a noise meter and input into a radio set. At the same time, an actual sound as noise is input through a microphone and a microphone amplifier into ...
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A noise monitor for transmitting an actual sound (noise) when the noise level becomes higher than a regulation standard. In each noise detecting unit, the level of noise is measured through a microphone and a noise meter and input into a radio set. At the same time, an actual sound as noise is input through a microphone and a microphone amplifier into ...
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Noise dosimeter for monitoring exposure to impulse noise
Applied Acoustics, 2005Abstract Commercially available noise dosimeters do not perform properly in impulsive noise environments because they suffer from instrumentation limitations and lack metrics that characterize impulse noise. In this paper, a design concept is proposed for an impulse noise monitoring dosimeter that addresses the current dosimeter’s limited ...
Chucri A. Kardous +2 more
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Multimedia Approach for Traffic Noise Monitoring
2007 International Conference on Multimedia and Ubiquitous Engineering (MUE'07), 2007The paper presents a part of an advanced system for railway and road traffic monitoring in metropolitan areas utilizing analyses of sound, vision and air pollution based on a ubiquitous computing approach. This system is a functional part of a more complex solution designed for environmental monitoring in cities. The system consists of many autonomous,
Andrzej Czyzewski, Piotr Dalka
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The incorporation of digital noise correction into an environmental noise monitor
The Journal of the Acoustical Society of America, 1981Digital Noise Correction as applied to sound level measurement is based on adjusting the sound level readings to account for the instrument's electronic noise floor. DNC's application to a digital environmental noise monitor has lowered by 10 dB, the sound levels at which ±1-dB accuracy measurements can be taken.
J. E. Coulter, H. W. Hardenbergh
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