Title:
LOUD SPEAKER
Document Type and Number:
Japanese Patent JP3213779
Kind Code:
B2
Abstract:
PURPOSE: To provide loud speaker which reproduces sounds with a high articulation by inputting a place where articulate reproducing is desired and adjusting delay times and levels of plural speakers to focus the device on the target position.
CONSTITUTION: The output signal of a microphone 1 which gathers sounds in a place of reproducing is converted to a digital signal by an A/D converter 4, and meanwhile, delay times and levels to be set to respective signal processing means are calculated in a calculating means 6 so that the device is focused on the reproducing position inputted by a reproducing position input means 7, and the results of signal processings in signal processing means 8a to 8e based on calculated delay times and levels are converted from digital signals to analog signals by D/A converter, and they are amplified by amplifiers 2a to 2e and are reproduced in the target position with a high articulation by speakers 3a to 3e.
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Inventors:
Akihisa Kawamura
Masaharu Matsumoto
Hiroko Numazu
Masaharu Matsumoto
Hiroko Numazu
Application Number:
JP16053693A
Publication Date:
October 02, 2001
Filing Date:
June 30, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H03G3/02; H03H17/00; H03H17/08; H04R3/00; H04S1/00; (IPC1-7): H03G3/02; H04R3/00; H04S1/00
Domestic Patent References:
| JP55147695A | ||||
| JP541897A | ||||
| JP263335A | ||||
| JP60248099A |
Attorney, Agent or Firm:
Shigetaka Awano
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