20240012083. METHOD AND APPARATUS FOR MEASURING DIRECTIONS OF ARRIVAL OF MULTIPLE SOUND SOURCES simplified abstract (PROACTIVAUDIO GmbH)

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METHOD AND APPARATUS FOR MEASURING DIRECTIONS OF ARRIVAL OF MULTIPLE SOUND SOURCES

Organization Name

PROACTIVAUDIO GmbH

Inventor(s)

Luis Weruaga of Wien (AT)

Mathias Lehnfeld of Wien (AT)

Stefano Bider of Wien (AT)

METHOD AND APPARATUS FOR MEASURING DIRECTIONS OF ARRIVAL OF MULTIPLE SOUND SOURCES - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240012083 titled 'METHOD AND APPARATUS FOR MEASURING DIRECTIONS OF ARRIVAL OF MULTIPLE SOUND SOURCES

Simplified Explanation

The abstract describes a computer-implemented method for measuring the directions of arrival (DOAs) of acoustic signals recorded by a microphone array. The method involves bandpass-filtering the audio signals into spectral bands and computing the cross-products between pairs of microphones in each spectral band. The error between the computed cross-products and model cross-products calculated from DOA estimates is iteratively minimized. DOA estimates with powers constituting local maxima are determined as DOA candidates. The DOAs of the acoustic signals are measured from the DOA candidates of all spectral bands.

  • The method involves bandpass-filtering audio signals into spectral bands.
  • Cross-products are computed between pairs of microphones in each spectral band.
  • The error between computed cross-products and model cross-products is minimized iteratively.
  • DOA estimates with powers constituting local maxima are determined as DOA candidates.
  • The DOAs of the acoustic signals are measured from the DOA candidates of all spectral bands.

Potential applications of this technology:

  • Acoustic source localization and tracking in various environments.
  • Speech enhancement and noise reduction in audio recordings.
  • Audio beamforming for improved sound capture and separation.
  • Acoustic event detection and classification.

Problems solved by this technology:

  • Accurate measurement of the directions of arrival of acoustic signals.
  • Robust estimation of DOAs in the presence of noise and reverberation.
  • Efficient processing of audio signals from microphone arrays.
  • Improved localization and tracking of sound sources.

Benefits of this technology:

  • Enhanced spatial awareness and localization capabilities in audio systems.
  • Improved speech intelligibility and audio quality in noisy environments.
  • Enhanced performance of audio processing algorithms.
  • Increased accuracy and reliability in acoustic event detection and classification.


Original Abstract Submitted

a computer-implemented method for measuring the directions of arrival, doas, of acoustic signals recorded by a microphone array outputting audio signals, comprising: bandpass-filtering the audio signals into at least one spectral band; in each spectral band, for at least one pair of microphones, computing a cross-product between the audio signals of said pair, iteratively minimizing an error between the cross-products and model cross-products calculated from doa estimates, and determining those doa estimates whose powers constitute local maxima, as doa candidates; and measuring the doas of the acoustic signals from the doa candidates of all spectral bands. further disclosed is an apparatus for performing this method.

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