Toa Corporation

Toa Coporation

Satoshi Miyata

Hiroshi Kubota

Toshimitsu Suetsugu

Kensaku Fujii

Provided is a loudspeaker system capable of easily determining control parameters for controlling the directional characteristics of a speaker set including two or more speaker units. The loudspeaker system is configured to include: a speaker setincluding two or more speaker units; a cameraadapted to photograph an acoustic space of the speaker set; a monitoradapted to display a camera imagephotographed by the camera; and a directional control parameter generating partadapted to generate directional control parameters providing the directional characteristics of the speaker set. The directional control parameter generating partsincludes: a target position designation partadapted to, on the basis of user operations, designate target positionson the camera image; a directional control angle calculation partadapted to, on the basis of the target positions, obtain directional control angles &#x3b8; with respect to a front direction of the speaker set; and a directional control parameter determination partadapted to, on the basis of the directional control angles &#x3b8;, determine the directional control parameters.

Loudspeaker system

To provide a speaker apparatus that can detect miswiring to a speaker unit or trouble of a speaker unit itself. The speaker apparatus is configured to include: two or more speaker unitsthat are arranged in a speaker housing; a sensor microphonethat is arranged in the speaker housingand outputs a sound collection signal; a target unit selection partthat selects any one of the speaker unitsas a target unit; a sound signal supply partthat supplies an external sound signalto the target unit; and an error detection partthat provides an error output on the basis of the external sound signaland the sound collection signal

Speaker device

To provide a speaker device that can form a substantially uniform sound field over a range from a long distance to a short distance without significantly increasing a calculation load. A plurality of FIR filterstoperform delay control of respective speakers so as to increase a delay time difference between adjacent speakerstoin a line array speakertoward one end of the line array speaker, and thereby over a wide range from a long distance to a short distance, a sound filedis formed. Also, by adding a common shift delay time Dc to filter coefficients for the FIR filtersto, the delay time difference between adjacent speakerstois made less than a sampling period of a sound signal to form a wide and uniform sound field

Speaker device and filter coefficient generating device therefor

A noise eliminating apparatus includes a first microphone, a second microphone and a signal processing unit, the signal processing unit includes a linear prediction filter and a noise resynthesis filter, the linear prediction filter receives an output signal of the first microphone, predicts the output signal of the first microphone by linear prediction and generates a prediction signal, and the noise resynthesis filter is an adaptive filter which receives, as a main input signal, a first difference signal obtained by subtracting one of the output signal of the first microphone and the prediction signal from the other, receives, as an error signal, a second difference signal obtained by subtracting one of an output signal of the second microphone and an output signal of the noise resynthesis filter itself from the other, and updates a filter coefficient so that the error signal is minimized.

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Kobe, Japan

Satoshi Miyata