JPS5639667A - Directional transmission-reception unit - Google Patents
Directional transmission-reception unitInfo
- Publication number
- JPS5639667A JPS5639667A JP11558379A JP11558379A JPS5639667A JP S5639667 A JPS5639667 A JP S5639667A JP 11558379 A JP11558379 A JP 11558379A JP 11558379 A JP11558379 A JP 11558379A JP S5639667 A JPS5639667 A JP S5639667A
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- speaker
- group part
- wavelength
- reception unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
PURPOSE:To enable origination in an originating-subscriber's natural state and to improve S/N by arraying microphone units linearly at random equal intervals and by arranging a speaker on the array axis of microphone units. CONSTITUTION:Microphone units 4-1-4-n are arrayed at intervals a half the wavelength of an acoustic wave of the maximum in-use frequency of microphone group part 3 and the number of microphones arrayed in a light is made quivalent to the wavelength of an acoustic wave of the minimum in-use frequency. On linear fitting base 2, microphone group part 3 and speaker part 5 are fixed and while the speaker opening front surface, while positioned on the axis of microphone group part 3, is turned to the side with an angle of 90 deg. to base 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11558379A JPS5639667A (en) | 1979-09-08 | 1979-09-08 | Directional transmission-reception unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11558379A JPS5639667A (en) | 1979-09-08 | 1979-09-08 | Directional transmission-reception unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5639667A true JPS5639667A (en) | 1981-04-15 |
JPH0123024B2 JPH0123024B2 (en) | 1989-04-28 |
Family
ID=14666173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11558379A Granted JPS5639667A (en) | 1979-09-08 | 1979-09-08 | Directional transmission-reception unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5639667A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041360A (en) * | 1984-02-10 | 1985-03-05 | Fujitsu Ltd | Loudening conference telephone system |
JPS63309615A (en) * | 1987-06-10 | 1988-12-16 | Kuraray Co Ltd | Heat-resistant organic synthetic yarn having excellent high-excellent configuration stability |
WO2007072757A1 (en) * | 2005-12-19 | 2007-06-28 | Yamaha Corporation | Sound emission and collection device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5631800U (en) * | 1979-08-20 | 1981-03-27 |
-
1979
- 1979-09-08 JP JP11558379A patent/JPS5639667A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5631800U (en) * | 1979-08-20 | 1981-03-27 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041360A (en) * | 1984-02-10 | 1985-03-05 | Fujitsu Ltd | Loudening conference telephone system |
JPH0427746B2 (en) * | 1984-02-10 | 1992-05-12 | Fujitsu Ltd | |
JPS63309615A (en) * | 1987-06-10 | 1988-12-16 | Kuraray Co Ltd | Heat-resistant organic synthetic yarn having excellent high-excellent configuration stability |
WO2007072757A1 (en) * | 2005-12-19 | 2007-06-28 | Yamaha Corporation | Sound emission and collection device |
US8243951B2 (en) | 2005-12-19 | 2012-08-14 | Yamaha Corporation | Sound emission and collection device |
US9049504B2 (en) | 2005-12-19 | 2015-06-02 | Yamaha Corporation | Sound emission and collection device |
Also Published As
Publication number | Publication date |
---|---|
JPH0123024B2 (en) | 1989-04-28 |
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