In theory, if the source of interest were directly in front of the listener, then a highly directional microphone pattern would produce the best speech intelligibility. However, in addition to the increased internal noise that such directional microphones produce (Chung, 2004), high directionality ...
array antennadirection of arrival (DOA)In this paper,a new method of microphone array is introduced.Theory of microphone array is based on array antenna techniques.In the proposed method,we exploit the directional constrained minimization of power(DCMP) algorithm for ...
As is known, the traditional approaches to realize acoustic directional sensing require a microphone array combined with a localization algorithm [7]. The fatal drawbacks of such approaches are the requirement of multiple microphones and complex signal processing algorithms. In order to break though ...
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
In one embodiment, a directional microphone array having (at least) two microphones mounted on opposite sides of a device generates forward and backward base signals from two (e.g., omnidirectional) microphone signals using diffraction filters and equalization filters. Each diffraction filter implements...
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...
Novel Inversion Theory and Sensor Structure of Biomimicry Directional MicrophoneSound source localizationOrmia OchraceaPartial differential equationWeighted integral methodMicromachined directional microphones (sound source localization sensor) mimicking an auditory organ of Ormia Ochracea have been intensively ...
sensor arrays 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. 6B, the right channel array38includes acoustic drivers218-3,218-4,218-5...
7.A portable electronic system as recited in claim 1 further comprising a microphone and a base unit,wherein the base unit is coupled to the speaker and the microphone, andwherein the system is configured to operate for wireless communication. ...
λλ, represents the longest wavelength the loudspeaker cabinet is configured to reproduce, this will be between 3-3000, and typically 16-300 Hz Previous Patent:SYSTEM FOR REDUCING VIBRATIONS IN LOUDSPEAKER Next Patent:ARRAY MICROPHONE SYSTEM AND METHOD OF ASSEMBLING THE SAME...