Performance characteristics of a phase domain approach to random noise synthesis.
Noise Control Eng J 1991 Jan; 36(1):18-32
The performance characteristics of a phase domain system for producing Gaussian and nonGaussian signals for investigating the effects of noise on hearing were examined. The system was designed to produce digitally generated analog signals of varying skewness and kurtosis (impulsiveness) but having identical root mean square levels and amplitude spectra. The system was capable of synthesizing nonGaussian random signals having chosen values of impulsiveness, skewness, and crest factors for any desired amplitude spectrum having pulse durations of 0 to 200 milliseconds, frequency ranges of 100 to 10000 hertz (Hz) and on/band band widths of 2 to 8 kilohertz. The system was used to synthesize simulated industrial noise wave forms by superimposing a nonGaussian signal consisting of high impulsive components that derived their energy from the on/band 100 to 10000Hz spectral region and an impact sequence that represented reflected components on a random Gaussian function that represented typical background noises emitted by various manufacturing processes. Examples of synthesized industrial noise wave forms were presented. The authors conclude that the phase domain system has the ability to design and produce families of complex wave forms that are useful for psychoacoustic, physiological, and engineering research.
NIOSH-Publication; NIOSH-Grant; Noise-induced-hearing-loss; Noise-analysis; Industrial-noise; Simulation-methods; Noise-frequencies; Laboratory-testing
Communicative Disorders & Scis Research Foundation of Suny P O Box 9 Albany, N Y 12201
Noise Control Engineering Journal
State University of New York at Buffalo, Buffalo, New York