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位相変調法による低周波信号の相関測定法
Correlation Measurement Using Phase Modulation Method in the Low Frequency Signal
1973
Acoustical Science and Technology
Correlation Measurement Using Phase Modulation Method in the Low Frequency Signal
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The pulse, the sing − around and the standing wave methods are mainly applied tQ under water sound velocity measurements . These methods are related to the correlation method , in that the error in measurement increases as the frequency is Iower when the 皿 easuring distance is fixed. Hence , we examined the system shown in Fig.1 as a method which eliIninates these weak
doi:10.20697/jasj.29.2_85
fatcat:2plwla2grrfkzej2fjfzpvhgpa