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- W2039968130 abstract "Acoustic intensity is usually estimated from the cross-spectrum of acoustic pressures measured by two adjacent microphones. The cross-spectrum, calculated by the digital Fourier transform technique, has unavoidable leakage error because the signal period does not usually coincide with the record length. Therefore, acoustic intensity, estimated by a conventional FFT analyzer, has distorted values. In our research, the expression of Fourier-transformed data of a harmonic signal with a single frequency was formulated when there was leakage error. A method to eliminate the effect of leakage error from contaminated data was also investigated. Some numerical examples show the validation of the proposed method." @default.
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- W2039968130 date "2004-01-01" @default.
- W2039968130 modified "2023-09-26" @default.
- W2039968130 title "A Study on the Leakage Error in the Spectrum of Acoustic Intensity" @default.
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- W2039968130 doi "https://doi.org/10.1299/jsmea.47.42" @default.
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