The weighting coefficients are determined by an optimization process. By bandpass filtering the weighted microphone signals with a set of filters covering the audio frequency range and summing the filtered signals, a receiving microphone array with a small aperture size is caused to have a directivity...
Artificially designed acoustic meta-surfaces have the ability to manipulate sound energy to an extraordinary extent. Here, we report on a new type of directional reflective surface consisting of an array of sub-wavelength Helmholtz resonators with varyin
Suppressing interfering noise is still a major challenge for most communication devices involving a sound pick up system such as a microphone or a multi-microphone array. The multi-microphone array can selectively enhance sounds coming from certain directions while suppressing interference coming from oth...
with frequency invariant far-field beam patterns, J. Acoust. Soc. Am. 97 (2), February 1995. Mathematically, directional microphone array concepts may generally be applied to loudspeakers. Similarly, in FIG. 4B, the right channel array34includes acoustic drivers18-3,18-4,18-5,18-6, and18...
These approaches are based on a method previously presented by the authors, in which point source DOAs were estimated by using a broadband signal model and solving a group-sparse optimization problem, where the number of observations made by the rotating directional microphone can be lower than ...
The weighting coefficients are determined by an optimization process. By bandpass filtering the weighted microphone signals with a set of filters covering the audio frequency range and summing the filtered signals, a receiving microphone array with a small aperture size is caused to have a directivity...
Here, we present an optimized fly Ormia ochracea's ears-inspired piezoelectric MEMS directional microphone with bare minimum self-noise. The optimization was carried out in terms of sensor dimensions, sensing, and processing circuitry. Accordingly, the developed device showed 25.52 dB SPL self-...
2. A hearing aid according to claim 1 wherein said predefined criterion comprises a minimization of a difference or distance measure between the resulting transfer function Hpinna(θ, φ, r, k) and the transfer function HITE(θ, φ, r, k) of the microphone located close to or in the ea...
1. An electronic device, comprising: one or more processors; a microphone; and memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for: receiving training data for a data-driven learning network, wherein ...
and so forth. Information also may be entered into device700by way of microphone (not shown), or may be digitized by a voice recognition device. Embodiments are not limited in this context. Integrated into at least the back702is camera705(e.g., including a lens, an aperture, and an ima...