Journal ArticleDOI
Measurement of acoustic intensity using the cross‐spectral density of two microphone signals
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TLDR
In this article, a technique for evaluating the acoustic intensity vector in an arbitrary environment by measuring the imaginary part of the cross-spectral density between the output signals from two closely spaced, pressure microphones is presented.Abstract:
A technique is presented for evaluating the acoustic‐intensity vector in an arbitrary environment by measuring the imaginary part of the cross‐spectral density between the output signals from two closely spaced, pressure microphones.read more
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Journal ArticleDOI
A review of vibration and acoustic measurement methods for the detection of defects in rolling element bearings
Naresh Tandon,A. Choudhury +1 more
TL;DR: Vibration measurement in both time and frequency domains along with signal processing techniques such as the high-frequency resonance technique have been covered and recent trends in research on the detection of defects in bearings have been included.
Journal ArticleDOI
Effects of exposure to seismic airgun use on hearing of three fish species.
Arthur N. Popper,Michael E. Smith,Peter A. Cott,Bruce W. Hanna,Alexander O. MacGillivray,Melanie E. Austin,David A. Mann +6 more
TL;DR: It is concluded that these three species are not likely to be substantially impacted by exposure to an airgun array used in a river seismic survey, however, care must be taken in extrapolation to other species and to fishes exposed to airguns in deeper water or where the animals are exposed to a larger number of airgun shots over a longer period of time.
Journal ArticleDOI
A 90 nm CMOS, $6\ {\upmu {\text{W}}}$ Power-Proportional Acoustic Sensing Frontend for Voice Activity Detection
TL;DR: In this article, the authors presented a new power-proportional sensing paradigm and the use of machine-learning-assisted moderate-precision analog analytics for classification of speech and non-speech.
Journal ArticleDOI
Cross spectral density methods for measuring structure borne power flow on beams and pipes
Journal ArticleDOI
A simple neutrally buoyant sensor for direct measurement of particle velocity and intensity in water
TL;DR: Leslie et al. as mentioned in this paper used a moving-coil sensor embedded in a neutrally buoyant package, which produces a voltage directly proportional to the particle velocity in the surrounding fluid for frequencies above the mass-spring resonance.
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