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Convention Paper

The Lower Limit of Detectable Sound Pressure

Authors: Tarnow, Viggo

AES Convention 50 · Paper L-27 · March 1975

Abstract

The smallest sound pressure that may be detected in a conventional measuring system is determined by two noise sources. The first is a microphone itself, and the second is the preamplifier connected to the microphone. An experimental 1-in diameter microphone has been constructed, in which very low noise and broad bandwidth were the major design considerations. In the following, the results of measurements on the microphone are given, and the theoretical basis for noise in microphones is explained. It was found that only thermal noise in the microphone was important.

Details

Published in
AES Convention 50
AES Convention
50
Paper number
L-27
Publication date
March 6, 1975
Affiliation
Bruel and Kjaer, Nerum, Denmark (See document for exact affiliation information.)
Type
Convention Paper