# US 10,313,794 B2 · Speaker system

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- Number: US 10,313,794 B2
- Document ID: US10313794B2
- Status: Granted
- Kind: B2
- Application number: 15/947,541
- Filed: 2018-04-06
- Published: 2018-10-11
- Granted: 2019-06-04
- Earliest claimed: 2017-04-09
- Applicants: Tomoaki Kanoko
- Inventors: Tomoaki Kanoko
- Web page: https://patentgrep.com/patent/US10313794B2

## CPC

- H04R 5/02: Spatial or constructional arrangements of loudspeakers
- H04R 1/02: Casings; Cabinets {; Supports therefor;} Mountings therein (H04R1/28 takes precedence {; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075})
- H04R 1/403: {loud-speakers}
- H04S 1/002: {Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution (control circuits for electronic adaptation of the sound field H04S7/30)}
- H04S 2400/15: Aspects of sound capture and related signal processing for recording or reproduction
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- H04S: STEREOPHONIC SYSTEMS

## Abstract

The present invention is a speaker system for reproducing sound close to the actual sound of instruments or actual acoustic field. The instruments output sounds in various directions. For example, reverse phase sound is output and human voice is output in forward direction. Therefore, the speaker capable of reproducing stereophonic sound close to the original sound without limiting a listening point is required. In a speaker cabinet 5, left and right speakers 3, 4 are arranged back to back with each other to output normal phase sound and reverse phase sound from left and right. Front left and front right speakers 1, 2 are slightly facing to each other to output the sound like a voice by a point sound source. Sounds of the front speakers and left and light speakers are overlapped with each other and stereophonic sound can be reproduced.

## Claims

### Claim 1

A speaker system, comprising:
a speaker cabinet; and
a pair of left and right speakers mounted respectively on left and right sides of the speaker cabinet, the left and right speakers being arranged back to back with each other; and
a pair of front left and front right speakers mounted horizontal to each other on the speaker cabinet, wherein
a space between back surfaces of the left and right speakers is not interrupted by an obstacle in more than 50% area of a whole area of the back surfaces so that a reverse phase sound output from one of the left and right speakers is interfered with a normal phase sound output from the other of the left and right speakers,
the reverse phase sound output from the left and right speakers comes out from ducts located at left and right sides of the speaker cabinet,
the front left and front right speakers are facing to each other with an angle of 90° to 150°, and
the front left and front right speakers are mounted on a front side in a front-rear direction and a center side in a left-right direction compared to the left and right speakers.

### Claim 2 (depends on 1)

The speaker system according to claim 1, wherein
a first straight line connecting the left and right speakers intersects second straight lines extending backward from each of the front left and front right speakers, and
third straight lines extending forward from each of the front left and front right speakers intersect with each other in front of a listening point.

### Claim 3 (depends on 1)

The speaker system according to claim 1, wherein
the ducts are provided on both front and rear ends of the left and right sides of the speaker cabinet.