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AES Journal Forum
High-Intensity Infrasonic Acoustic Test System that Uses a Two-Volume Helmholtz Resonator
The design, mathematical modeling, construction, and testing of an acoustic test system intended to support the performance of high-intensity acoustic effects experiments on large targets at low-sonic to infrasonic frequencies described. The system uses a compressed-air source based on automotive superchargers, a low-impedance airflow modulator, and a two-volume Helmholtz resonator test chamber to achieve sustained high-purity sinusoidal sound pressure levels in excess of 155 dB in a 2.5-m3 test volume at frequencies from 2 to 20 Hz.
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