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Sound recording with the application of microphone arrays

Kornatowski E.

Computer Applications in Electrical Engineering

2011

Vol. 9

213--222

In this article the issues concerning sound recording with the use of three-dimensional systems of several microphones were considered. The issues under study concern the so called beamforming, which is modeling three-dimensional directivity patterns of microphone arrays, as well as modern technologies of multichannel recording production with the purpose of reproduction in surround sound systems.

Conversion of stereo recording to 5.1 format using head-related transfer functions

Hen P., Kin M. J., Plaskota P.

Archives of Acoustics

2008

Vol. 33, No. 1

7-10

The paper presents the conversion of stereo recordings into multi-channel format 5.1 by means of the HRTF filtering. An algorithm of additional channels preparation (a central one and two surround ones) using various filters created on the base of HRTF was tested. The filter bank was prepared on the basis of impulse responses given by users. The algorithm uses the impulse response convolution of the filter with a processed signal. The convolution is realized in frequency domain, i.e. Fourier transforms of the processed signals are multiplied. Recordings created in such way were tested for the features of sound color distortion and spaciousness of the audio-scene in frontal plane.