Patent ID: 7123725
Filing Date: 2006-10-17
Classification: G01N,G10K

Abstract:
1. A method for subjecting a test subject to an acoustical field comprising: supplying a chamber encompassing an input volume and having an inlet; supplying another chamber encompassing a test volume: interconnecting said chamber to said another chamber with a tuning port which forms a Helmholtz resonator interconnecting said input volume to said test volume; positioning the test subject within said test volume; and applying a periodic acoustic signal having a predetermined driving frequency from an acoustic energy source into said input volume through said inlet to establish an acoustic field in said input volume; coupling the acoustic field in said input volume to the test volume of said another chamber through said tuning port which forms a Helmholtz resonator tuned to said predetermined driving frequency whereby a test subject in said test volume is subjected to a resonance amplified periodic acoustic field at said predetermined driving frequency while the test volume is isolated from the acoustic energy sources; applying a sequence of periodic acoustic signals at different driving frequencies into said input volume: and physically adjusting said tuning port to tune the Helmholtz resonator to each of said different driving frequencies to thereby subject the test subject to a resonance amplified periodic acoustic field in said test volume at each of said different driving frequencies.