摘要:

The cross section for scattering of sound by underwater turbulence is calculated by modifying Monin's calculation of the same effect in the atmosphere. The contributions of thermal inhomogeneities and flow velocity inhomogeneities are explicitly separated. Using parameters appropriate to relatively intense natural ocean turbulence, it is seen that the temperature variations are the more important cause of the scattering of sound.

ISSN:0001-4966    

DOI:10.1121/1.1912435

出版商:Acoustical Society of America    

年代:1971

数据来源: AIP

摘要:

Measurements show that the standard 10‐dB maximum correction factor for particle velocity augmentation in a spherically divergent sound field can safely be increased to 25 dB.

ISSN:0001-4966    

DOI:10.1121/1.1912437

出版商:Acoustical Society of America    

年代:1971

数据来源: AIP

摘要:

Experimental measurements of intensities and beam patterns of a parametric sonar transmitting array are presented. For a mean primary frequency of 720 kHz, secondary source levels up to 90 dB//1 μbar at 1 m were attained at 50 kHz. At this level, however, saturation effects broaden the beamwidth to 8° compared to the unsaturated value of 3°.

ISSN:0001-4966    

DOI:10.1121/1.1912438

出版商:Acoustical Society of America    

年代:1971

数据来源: AIP

摘要:

A set of curves is given to facilitate finding the source level of explosive charges fired at any depth in the sea.

ISSN:0001-4966    

DOI:10.1121/1.1912439

出版商:Acoustical Society of America    

年代:1971

数据来源: AIP

ISSN:0001-4966    

DOI:10.1121/1.1912441

出版商:Acoustical Society of America    

年代:1971

数据来源: AIP