scholarly journals An acoustic intensity measurement simulation for evaluating sound power determination standards

1989 ◽  
Vol 85 (S1) ◽  
pp. S12-S12
Author(s):  
Frédéric Laville ◽  
Jean‐Luc Agnan ◽  
Jean Nicolas
Keyword(s):  
Intensity Measurement ◽  
Sound Power ◽  
Acoustic Intensity

Visualization of the power reduction of piezorubber underwater array by near‐field acoustic intensity measurement

1996 ◽  
Vol 100 (4) ◽  
pp. 2585-2585
Author(s):  
Daiji Mikami ◽  
Tomoki Yokoyama ◽  
Akio Hasegawa ◽  
Toshiaki Kikuchi
Keyword(s):  
Near Field ◽  
Power Reduction ◽  
Intensity Measurement ◽  
Acoustic Intensity

Influence of Pavement Roughness on Tire Noise

1999 ◽  
Author(s):  
Richard J. Ruhala ◽  
Courtney B. Burroughs
Keyword(s):  
Power Spectra ◽  
Leading Edge ◽  
Sound Power ◽  
Acoustic Intensity ◽  
Radiated Noise ◽  
Tire Noise ◽  
Pavement Roughness ◽  
Different Types ◽  
Acoustical Holography ◽  
Nearfield Acoustical Holography

Abstract In this study, the influence of the levels of pavement roughness on tire noise is examined using Nearfield Acoustical Holography (NAH) to measure noise from single tires mounted on a two-wheel trailer towed over different types of pavements. Contributions to the radiated noise from the leading edge, trailing edge, and sidewall of two tires are identified. Two experimental tires — a blank tire and a monopitch tire — are evaluated on three pavements — smooth asphalt, stud-damaged concrete, and Ellsworth — at 56 km/hr. From the measured complex pressure, acoustic intensity is reconstructed on side plane of the tires using NAH procedures. Additionally, sound power spectra levels are presented. Tire noise generating mechanisms associated with each pavement are inferred from measurements. The experimental results are compared with theories on pavement-induced tire noise available in the literature.

Instrumentation for underwater acoustic intensity measurement

2016 ◽  
Author(s):  
Zhi Li ◽  
Hongjuan Chen ◽  
Hu Zhang ◽  
Wenzhi Wang ◽  
Tianji Zhao ◽  
...  
Keyword(s):  
Intensity Measurement ◽  
Acoustic Intensity ◽  
Underwater Acoustic
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