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ABSTRACT
Acoustic measurement involves devices which measure the acoustic pressure as well as the intensity of the signal. The article focuses on two specialized devices: sonometers and condenser microphones. The first one indicates the acoustic pressure level, the second contains a diaphragm that vibrates under the action of an acoustic wave. The behavior according to frequency, calibration and also the measurement domains are detailed for each of them. The acoustic intensity, on its part, is the measurement of the transport of acoustic energy in an acoustic field; this parameter remains essential in the strategy of fight against noise pollution.
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Read the articleAUTHORS
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Viggo TARNOW: Engineer - Professor at the Technical University of Denmark
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Finn JACOBSEN: Doctor of Science - Lecturer at the Technical University of Denmark
INTRODUCTION
Acoustic measurement uses instruments that measure both pressure and signal intensity.
In particular, this dossier will present two specialized devices: sound level meters and microphones. It will cover all the major information you need to know about microphones, such as their calibration and the various sound intensity measurement methods in which they are used.
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Mechanical and dimensional measurements
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Acoustic measurement instruments
Sound pressure measurement
Sound intensity measurement
Conservation of acoustic energy
Energy considerations are extremely important in acoustics, and determining the sound power of sources is an essential point in noise control strategy. This is because the acoustic power of a source is largely independent of its environment in the audible frequency range. It is therefore useful to measure acoustic intensity, which is...
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