Optical System For Audio Spectrum Analysis

Peter D. Poulsen; Irvin P. Vatz

doi:10.1117/12.958521

25 April 1980 Optical System For Audio Spectrum Analysis

Peter D. Poulsen, Irvin P. Vatz

Proceedings Volume 0218, Devices and Systems for Optical Signal Processing; (1980) https://doi.org/10.1117/12.958521
Event: 1980 Los Angeles Technical Symposium, 1980, Los Angeles, United States

Abstract

Spectrum analysis at audio frequencies can be achieved using a strobe type optical system. A demonstrator has been fabricated with sensitivity ranging from 0.1 Hz to 10 KHz. The system examines fifty-four frequency bands simultaneously over a two octave region selectable anywhere in the sensitivity range. Resolution of 1/27th octave, in approximately 2.5% frequency steps, is obtained. First applications address diagnostics of mechanical systems for main-tenance purposes.

Citation Download Citation

Peter D. Poulsen and Irvin P. Vatz "Optical System For Audio Spectrum Analysis", Proc. SPIE 0218, Devices and Systems for Optical Signal Processing, (25 April 1980); https://doi.org/10.1117/12.958521

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