Accurate analysis of multitone signals using a DFT.
Optimum data windows make it possible to determine accurately the amplitude, phase, and frequency of one or more tones (sinusoidal components) in a signal. Procedures presented in this paper can be applied to noisy signals, signals having moderate nonstationarity, and tones close in frequency. They are relevant to many areas of acoustics where sounds are quasistationary. Among these are acoustic probes transmitted through media and natural sounds, such as animal vocalization, speech, and music. The paper includes criteria for multitone FFT block design and an example of application to sound transmission in the atmosphere.
Department of Mechanical Engineering, University of Hawaii, 2540 Dole Street, Honolulu, Hawaii, USA. jcb@hawaii.edu
John C
JC
Burgess
D000162:Acoustics; D000818:Animals; D005583:Fourier Analysis; D006801:Humans; D009146:Music; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography; D013060:Speech; D014828:Vocalization, Animal