Portable Sonic Boom Simulation.

A method is presented to simulate sonic booms using high fidelity and custom-built audio equipment that output to an acoustically treated listening environment, all of which is contained in a portable vehicle. The audio system has inherent low and high frequency performance limitations and also introduces distortion due to the frequency response of the system. The limitations of the system are compensated for by band-pass filtering a full-fidelity sonic boom signature and applying a system equalization filter. The purpose of the band-pass filter is to remove frequency content above and below the capabilities of the system yet retain the audible and felt characteristics of the full-fidelity waveform. The equalization filter, computed from time-domain Wiener filtering, compensates for the frequency-dependent system response of the audio system at several listening positions. The system performance is evaluated by comparing the PLdB, SEL(A) and SEL(C) of the measured system output to the full-fidelity waveform. Results show good agreement between the loudness levels of the full-fidelity waveform and the corresponding measured system output. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]