Year: 1965
Type: article
Abstract: Research and development leading to an electropneumatic acoustic generator capable of producing in excess of 6 kW of acoustic power is reviewed. The modulation of pneumatic power by the use of an electrodynamically controlled valve provides a transducer capable of producing either random or complex periodic signals. The development of this valve required considerable investigation of materials and fabrication techniques to establish the necessary compliance and optimized moving-valve structure to obtain a reliable sound generator. The efficiency of this generator with respect to the pneumatic power supply is as high as 17%. The evaluation of the power spectrum, amplitude distribution, and nonlinear characteristics of the transducer is performed in a progressive-wave tube. Current developments include units that produce considerably more acoustic power or extend the useful frequency range of the sound generator.
DOI: 10.1121/1.1939396
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2013147152