Acoustic impulse response method as a source of undergraduate research projects and advanced laboratory experiments

作者：Robertson W M^*; Parker J M

来源：Journal of the Acoustical Society of America, 2012, 131(3): 2488-2494.

DOI：10.1121/1.3677239

• acoustic noise
• acoustic signal processing
• Fourier transforms
• microphones
• transient response

A straightforward and inexpensive implementation of acoustic impulse response measurement is described utilizing the signal processing technique of coherent averaging. The technique is capable of high signal-to-noise measurements with personal computer data acquisition equipment, an amplifier/speaker, and a high quality microphone. When coupled with simple waveguide test systems fabricated from commercial PVC plumbing pipe, impulse response measurement has proven to be ideal for undergraduate research projects-often of publishable quality-or for advanced laboratory experiments. The technique provides important learning objectives for science or engineering students in areas such as interfacing and computer control of experiments; analog-to-digital conversion and sampling; time and frequency analysis using Fourier transforms; signal processing; and insight into a variety of current research areas such as acoustic bandgap materials, acoustic metamaterials, and fast and slow wave manipulation.

• 出版日期2012-3