Method for measuring transient sound source characteristics in reverberation pool

A measurement method and sound source technology, applied to vibration measurement in fluid, vibration measurement, measurement device and other directions, can solve problems such as insufficient information processing, incomplete frequency display, etc., and achieve measurement conditions that are easy to achieve, good stability, Measuring Efficient Effects

Active Publication Date: 2019-01-18
HARBIN ENG UNIV
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  • Application Information

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Problems solved by technology

[0006] To sum up, the existing technology has problems such as insufficient information processing and incomplete display of frequency points.

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  • Method for measuring transient sound source characteristics in reverberation pool
  • Method for measuring transient sound source characteristics in reverberation pool
  • Method for measuring transient sound source characteristics in reverberation pool

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] A measurement method for measuring the transient acoustic characteristics of underwater sound sources in a reverberation pool

[0051] The invention provides a method for measuring the transient sound characteristics of an underwater sound source in a reverberation pool. The method includes the following steps: (1) laying a standard sound source and a hydrophone array in the reverberation pool: A known standard sound source is placed on the pool wall at a wavelength greater than the lowest analysis frequency; hydrophones are arranged in the entire space of the pool, and the spacing is not greater than the minimum half wavelength; (2) The known standard sound source emits a steady-state broadband signal and measures the mixed The frequency-domain sound field correction of the sound pool; (3) replace the standard sound source emission with the transient sound sour...

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Abstract

The invention belongs to the field of acoustic measurement research, and particularly relates to a method for measuring the transient sound source characteristics in a reverberation pool. The method comprises the following steps: placing a standard sound source and a hydrophone array in the reverberation pool; placing a known standard sound source at a position having a distance with a pool wall greater than a minimal analysis frequency wavelength in the pool; placing hydrophones in a whole space in the pool, wherein the maximal distance is greater than a minimal half-wavelength, and line array placement and single placement via a bracket are adopted during the placement; causing the known standard sound source to emit a steady state broadband signal, and measuring a frequency domain soundfield correction amount of the reverberation pool; replacing the standard sound source with a transient sound source to be measured for emission, and collecting time domain sound pressure data; performing power spectrum calculation on the time domain data of all array elements to obtain a sound power level (the formula is described in the specification), and performing space average processing toobtain a spatial average sound power level (LW); and performing self-correlation processing on the time domain data fn(t) of all array elements. The invention provides a pool measurement method of transient sound characteristics, which is suitable for the quantitative acoustic evaluation of transient sound, and the method has the advantages of relatively good stability, easy implementation of measurement conditions, high measurement efficiency, etc.

Description

technical field [0001] The invention belongs to the field of acoustic measurement research, and in particular relates to a method for measuring transient sound source characteristics in a reverberation pool. Background technique [0002] The application of the reverberation field originated from the reverberation chamber in aeroacoustics. It is widely used in the measurement of the sound absorption coefficient of acoustic materials, the sound transmission loss of buildings, and the radiated sound power of sound sources. The reverberation pool can also be used for energy conversion. calibration. The experimental conditions and measurement methods in the reverberation pool are very different from those in the reverberation chamber. The sound field of the reverberation pool is more uneven, and the measurement requires full-space acquisition, and spatial technology is used to eliminate the interference of the boundary. [0003] The steady-state radiation noise level of underwat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H3/14
CPCG01H3/14
Inventor 唐锐李琪尚大晶于心月张峻铭张义明
Owner HARBIN ENG UNIV
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