Radiation from omnidirectional sources
Acoustic wave radiation

TE5132 V1 Article

Radiation from omnidirectional sources
Acoustic wave radiation

Author : Jacques JOUHANEAU

Review date: January 1, 2024 | Lire en français

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1. Radiation from omnidirectional sources

1.1 Radiation impedance of the pulsating sphere

Each surface element dS of a pulsating sphere exerts a force df ₀ on the fluid (figure 1 ).

As in the case of the membrane vibrating at the end of a tube of constant cross-section (see article § 1.4.2), we are led to define, for the sphere vibrating with an effective velocity v _a , a radiation impedance Z _R : $Z_{R} = \int_{4 π} \frac{d f_{0}}{v_{a}} = 4 π a^{2} Z_{S} (a)$

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Radiation from omnidirectional sources

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Radiation from directional sources

General works

(1) - BERANEK (L.L.) - Acoustics - . Mc Graw Hill (1954).
(2) - OLSON (H.F.) - Acoustical engineering - . Van Nostrand (1965).
(3) - MORSE (P.M.) et INGARD (K.U.) -...

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