Spatial structure of low-frequency wind noise.
The distinguishing spatial properties of low-frequency microphone wind noise (turbulent pressure disturbances) are examined with a planar, 49-element array. Individual, propagating transient pressure disturbances are imaged by wavelet processing to the array data. Within a given frequency range, the wind disturbances are much smaller and less spatially coherent than sound waves. Conventional array processing techniques are particularly sensitive to wind noise when sensor separations are small compared to the acoustic wavelengths of interest.
Wilson
D Keith
DK
US Army Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, 72 Lyme Rd., Hanover, New Hampshire 03755, USA. d.keith.wilson@erdc.usace.army.mil
Greenfield
Roy J
RJ
White
Michael J
MJ
D000669:Amplifiers, Electronic; D008962:Models, Theoretical; D009622:Noise; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography; D013997:Time Factors; D014160:Transducers, Pressure; D014919:Wind