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Convention Paper

Vibrations in the Loudspeaker Enclosure Evaluated by Hot Wire Anemometry and Laser Interferometry

Authors: Djurek, Danijel; Demoli, Nazif

AES Convention 130 · Paper 8321 · May 2011

Abstract

Vibration states of the loudspeaker enclosure were examined by the laser interferometry and hot wire anemometry. According to simple expressions, air pressure in the enclosure is independent on air density. This statement has been tested by the use of gases indicated by very different densities (air, He, SF6), and interferometric data show a strong dependence of vibration states of the enclosure walls on density, when driving frequency increases from 500 Hz up to 1 kHz. The principal reason for a deviation resides in the imaginary part of the Morse impedance exerted by the vibrating gas within the enclosure.

Details

Published in
AES Convention 130
AES Convention
130
Paper number
8321
Publication date
May 6, 2011
Session subject
Loudspeakers
Affiliation
AVAC (Alessandro Volta Applied Ceramics) Laboratory for Nonlinear Dynamics, Zlatar-Bistrica, Croatia; Institute of Physics, Zagreb, Croatia (See document for exact affiliation information.)
Type
Convention Paper