METHOD FOR ACOUSTIC REPRESENTATION OF SPATIAL INFORMATION FOR USERS Russian patent published in 2014 - IPC A61F9/08 G06F19/00 

FIELD: physics.

SUBSTANCE: method for acoustic representation of spatial information for users includes emitting a frequency-modulated ultrasonic pulse, binaural reception of an echo signal at two ultrasonic microphones, amplifying and converting electrical echo signals to acoustic signals, matched filtering of the echo signals, time-base expansion of the obtained responses in binaural reception channels, followed by perception of the signals by a human auditory analyser. The method includes preliminary testing for each channel of the auditory system of the user by presenting acoustic signals with different frequencies on a background of natural noise, performing statistical analysis of perception thereof by the auditory analyser of the user based on correct detection, missing and false detection of signals with respect to the total number of presented acoustic signals and obtaining adjusting gain coefficients for each channel. After matched filtering and time-base expansion the obtained responses in binaural reception channels, the method includes performing multichannel scaled-temporal filtering of responses via forward and inverse wavelet transform thereof, followed by weighted summation of output signals of each channel based on the obtained adjusting gain coefficients in each channel.

EFFECT: use of the invention improves recognition of objects by improving noise-immunity of the acoustic system.

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