A method for measuring the frequency dispersion for broadband pulses propagated to long ranges
作者:
T. C. Yang,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1984)
卷期:
Volume 76,
issue 1
页码: 253-261
ISSN:0001-4966
年代: 1984
DOI:10.1121/1.391102
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The time‐frequency structure of broadband pulses propagating to long ranges is analyzed with the stationary phase approximation. A method based on this analysis is proposed for measuring the fine structure of the frequency dispersion. The new method determines the mode frequencies to a precision of 0.5 Hz whereas the precision of the sonogram method is typically several Hz. Implications of this improved frequency dispersion measurement are discussed.
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