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Revisiting Proximity Effect Using Broadband Signals

Experiments studying mainly proximity effect are presented. Pink noise and music were used as stimuli and a combo guitar amplifier as source to test several microphones: omnidirectional and directional. We plot in-axis levels and spectral balances as functions of x, the distance to the source. Proximity effect was found for omnidirectional microphones. In-axis level curves show that 1/x law seems poorly valid. Spectral balance evolutions depend on microphones and moreover on stimuli: bigger decreases of low frequencies with pink noise; larger increases of other frequencies with music. For a naked loudspeaker, we found similar in-axis level curves under and above the cut-off frequency and propose an explanation. Listening equalized music recordings will help to demonstrate proximity effect for tested microphones.

Authors: Elliq, Mohammed; Lambert, Dominique; Lopes, Manuel; Millot, Laurent; Pelé, Gérard
Affiliations: ENS Louis-Lumiere; IEAC Paris 1 /ENS Louis-Lumiere(See document for exact affiliation information.)
AES Convention:122 (May 2007) Paper Number:7106 Import into BibTeX
Subject:Microphones and Loudspeakers

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