JPH0123024B2 - - Google Patents
Info
- Publication number
- JPH0123024B2 JPH0123024B2 JP54115583A JP11558379A JPH0123024B2 JP H0123024 B2 JPH0123024 B2 JP H0123024B2 JP 54115583 A JP54115583 A JP 54115583A JP 11558379 A JP11558379 A JP 11558379A JP H0123024 B2 JPH0123024 B2 JP H0123024B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- microphone
- sound
- section
- mounting base
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
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 JPS5639667A (en) | 1981-04-15 |
JPH0123024B2 true JPH0123024B2 (zh) | 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 (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041360A (ja) * | 1984-02-10 | 1985-03-05 | Fujitsu Ltd | 拡声会議電話装置 |
JPS63309615A (ja) * | 1987-06-10 | 1988-12-16 | Kuraray Co Ltd | 高温における形態安定性に優れた耐熱性有機合成繊維 |
EP1965603B1 (en) | 2005-12-19 | 2017-01-11 | Yamaha Corporation | Sound emission and collection device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6134799Y2 (zh) * | 1979-08-20 | 1986-10-09 |
-
1979
- 1979-09-08 JP JP11558379A patent/JPS5639667A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5639667A (en) | 1981-04-15 |
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