Sound-Pressure Distribution and Cavity Resonances for a New Artificial Voice
Viggo Tarnow · The Journal of the Acoustical Society of America · 1971
The artificial voice studied is the new model from Brüel & Kjær. The acoustic pressure obtained from it is given both in the far- and the nearfield. The pressure distribution in the latter case is compared with the one for the human voice; it is shown that they are similar. When telephone transmitters are tested, the question of the shift of acoustic flux due to reflection of sound waves from the transmitter arises. A measurement of this shift is given. The sound pressure varies with frequency because of cavity resonances in the air volumes within the voice. These resonances are studied by an expansion using eigenfunctions to compute the sound pressure in the volumes. From this follows a way to eliminate a standing wave that causes a disturbingly low sound pressure in a certain frequency range.