Investigation of effectiveness of microphone arrays for in car use based on sound field simulation
نویسندگان
چکیده
The effectiveness of small microphone arrays for in car use is investigated. These arrays are designed for speech enhancing at noise background within the cabin of a moving car. Speech and noise simulation based on designed mathematical algorithm of sound field modeling within a car cavity is applied for predicting effectiveness of the spatial-time processing algorithms. The mathematical model takes into account complicated cabin geometry, the difference of its sizes in wavelength scale at low and high frequencies, frequency dependent sound absorption of the cabin surfaces and distributed noise sources with their cross correlation.Theoretical estimates of the microphone arrays effectiveness and output simulated signals (for subjective estimation) are presented.
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