Journal ArticleDOI
Development of a directional hearing instrument based on array technology
TLDR
It is concluded that the developed microphones with strong directional characteristics using array techniques have the capability to reach a significant improvement of speech intelligibility in noise under practical circumstances.Abstract:
A directional hearing aid might be beneficial in reducing background noise in relation to the desired speech signal Conventional hearing aids with a directional cardioid microphone are insufficient because of the low directivity of cardioids Research was done to develop microphone(s) with strong directional characteristics using array techniques Particular emphasis was given to optimization and stability Free‐field simulations of several robust models show that a directivity index of 9 dB can be obtained at the higher frequencies Simulations were verified with a laboratory model The results of the measurements show a good agreement with the simulations Based on simulations and measurements, two portable models were developed and tested with a KEMAR manikin The KEMAR measurements show that the two models give an improvement of the signal‐to‐noise ratio of approximately 75 dB in a diffuse sound field It may be concluded that the developed microphones have the capability to reach a significant improvement of speech intelligibility in noise under practical circumstancesread more
Citations
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DissertationDOI
Prediction-driven computational auditory scene analysis
Daniel P. W. Ellis,Barry Vercoe +1 more
TL;DR: A blackboard-based implementation of the 'prediction-driven' approach is described which analyzes dense, ambient sound examples into a vocabulary of noise clouds, transient clicks, and a correlogram-based representation of wide-band periodic energy called the weft.
A New Method Based on Spectral Subtraction for Speech Dereverberation
TL;DR: A novel estimator of the non-stationary reverberationnoise power spectrum, based on a statistical model of late reverberation, brings about dramatic improvements in terms of automatic speech recognition scores in various reverberant environments.
BookDOI
Applications of digital signal processing to audio and acoustics
Mark Kahrs,Karlheinz Brandenburg +1 more
TL;DR: There are whole classes of algorithms that the speech community is not interested in pursuing or using in digital signal processing of sound and these algorithms and techniques are revealed in this book.
Journal ArticleDOI
Design of broadband beamformers robust against gain and phase errors in the microphone array characteristics
Simon Doclo,Marc Moonen +1 more
TL;DR: Two design procedures for designing broadband beamformers with an arbitrary spatial directivity pattern are described, which are robust against gain and phase errors in the microphone array characteristics.
Journal Article
Recognition of speech in noise with hearing aids using dual microphones.
TL;DR: Fifty subjects with mild to moderately severe sensorineural hearing loss and prior experience with amplification were evaluated at two sites and revealed that the benefit scores for background noise and reduced cues and backgroundnoise and aversiveness of sounds were significantly higher than those reported in the established norms.