摘要:

Measurements were made of the energy per unit‐area spectrum level of the shock wave 100 yd from 1‐lb TNT charges exploded underwater. Over the frequency range covered, 0.1–25 kc/sec, the measurements were in agreement with values calculated, using peak pressures and time constants reported by Arons. In particular, the decrease in spectrum level with increasing frequency of 6 dB per octave at high frequencies, characteristic of pulses with short rise times, continued up to the high‐frequency limit of the measuring equipment.

ISSN:0001-4966    

DOI:10.1121/1.1919193

出版商:Acoustical Society of America    

年代:1964

数据来源: AIP

摘要:

An expression is developed for the rate of change of travel time with source angle for a ray in a layer with a constant‐velocity gradient. This expression is then shown to be simply related to another ray‐tracing quantity, which is generally calculated in existing computer programs.

ISSN:0001-4966    

DOI:10.1121/1.1919194

出版商:Acoustical Society of America    

年代:1964

数据来源: AIP