LOUDSPEAKER APPARATUS

• US 20160205464A1
• Filed: 07/07/2014
• Published: 07/14/2016
• Est. Priority Date: 08/30/2013
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Miyata, Kouji
• Granted Patent: US 10,887,678 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: 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
• CPC Class Codes: H04R 1/227 using transducers reproducing the same frequency band
• CPC Class Codes: H04R 1/24 Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
• CPC Class Codes: H04R 1/26 Spatial arrangements of separate transducers responsive to two or more frequency ranges
• CPC Class Codes: H04R 1/403 loud-speakers
• CPC Class Codes: H04R 2201/028 Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure H04R2499/10 takes precedence; Single (sub)woofer with two or more satellite loudspeakers for mid- and high-frequency band reproduction driven via the (sub)woofer H04R2205/026
• CPC Class Codes: H04R 2205/022 Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure
• CPC Class Codes: H04R 3/04 for correcting frequency response
• CPC Class Codes: H04R 3/12 for distributing signals to two or more loudspeakers specially adapted for hearing aids H04R25/407
• CPC Class Codes: H04R 3/14 Cross-over networks

Abstract

A loudspeaker apparatus includes, for example, a first loudspeaker unit and a second loudspeaker unit that are configured to reproduce sound at least at a high frequency. The first loudspeaker unit and the second loudspeaker unit are placed on a plane having an axis extending in a horizontal direction and an axis extending in a vertical direction. The first loudspeaker unit is placed so as to be directed horizontally forward. The second loudspeaker unit is placed so as to be directed vertically upward to make an approximately 90° angle with the first loudspeaker unit. When a center of a diaphragm fixing face of the first loudspeaker unit is placed at an origin of the plane, and it is assumed that X represents a horizontally rearward direction and Y represents a vertically upward direction, the second loudspeaker unit is placed in a manner that coordinates of a center of a diaphragm fixing face of the second loudspeaker unit lie on a straight line represented by the following formula in the plane:

Y=−aX+b, where a>0,b>0,X>0, and Y>0.   (Formula)

Claims

1. A loudspeaker apparatus comprising:

a first loudspeaker unit and a second loudspeaker unit that are configured to reproduce sound at least at a high frequency,

wherein the first loudspeaker unit and the second loudspeaker unit are placed on a plane having an axis extending in a horizontal direction and an axis extending in a vertical direction,

wherein the first loudspeaker unit is placed so as to be directed horizontally forward,

wherein the second loudspeaker unit is placed so as to be directed vertically upward to make an approximately 90°

angle with the first loudspeaker unit, and

wherein, when a center of a diaphragm fixing face of the first loudspeaker unit is placed at an origin of the plane, and it is assumed that X represents a horizontally rearward direction and Y represents a vertically upward direction, the second loudspeaker unit is placed in a manner that coordinates of a center of a diaphragm fixing face of the second loudspeaker unit lie on a straight line represented by the following formula in the plane;

Y=−

aX+b, where a>

0,b>

0,X>

0, and Y>

0.  

 

(Formula)

2. The loudspeaker apparatus according to claim 1, comprising:

a first high pass filter connected to the first loudspeaker unit; and

a second high pass filter connected to the second loudspeaker unit,

wherein the first high pass filter has a cutoff frequency set to a value different from a cutoff frequency of the second high pass filter.

3. The loudspeaker apparatus according to claim 2,

wherein the cutoff frequency of the second high pass filter is set to a value larger than the cutoff frequency of the first high pass filter.

4. The loudspeaker apparatus according to claim 1,

wherein values for a and b in the formula are set within the following ranges:

0.85≦

a≦

1.9, and 46≦

b≦

105 (unit;

millimeter).

5. The loudspeaker apparatus according to claim 1,

wherein the first loudspeaker unit and the second loudspeaker unit have diaphragms with a same effective diameter and a same shape as each other.

6. The loudspeaker apparatus according to claim 5,

wherein each of the first loudspeaker unit and the second loudspeaker unit has a dome-shaped diaphragm with an effective diameter of 22 mm or less.

7. The loudspeaker apparatus according to claim 1,

wherein the first loudspeaker unit and the second loudspeaker unit are configured to reproduce sound including a band of 10 kHz or more.

8. The loudspeaker apparatus according to claim 1, comprising:

a third loudspeaker unit and a fourth loudspeaker unit that are configured to reproduce sound including a lower frequency than a band of sound reproduced by the first loudspeaker unit and the second loudspeaker unit,

wherein the third loudspeaker unit and the fourth loudspeaker unit are placed so as to be vertically aligned with the first loudspeaker unit.

9. The loudspeaker apparatus according to claim 1,

wherein an inclined face is formed between a first face where the first loudspeaker unit is placed and a second face where the second loudspeaker is placed by cutting off an edge at approximately 45°

with respect to the first face and the second face.