GB2110054B - Directional acoustic transducers - Google Patents
Directional acoustic transducersInfo
- Publication number
- GB2110054B GB2110054B GB08232811A GB8232811A GB2110054B GB 2110054 B GB2110054 B GB 2110054B GB 08232811 A GB08232811 A GB 08232811A GB 8232811 A GB8232811 A GB 8232811A GB 2110054 B GB2110054 B GB 2110054B
- Authority
- GB
- United Kingdom
- Prior art keywords
- acoustic transducers
- directional acoustic
- directional
- transducers
- acoustic
- 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
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
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/323,669 US4429191A (en) | 1981-11-20 | 1981-11-20 | Electret transducer with variably charged electret foil |
US06/323,668 US4429190A (en) | 1981-11-20 | 1981-11-20 | Continuous strip electret transducer array |
US06/323,696 US4429192A (en) | 1981-11-20 | 1981-11-20 | Electret transducer with variable electret foil thickness |
US06/323,684 US4434327A (en) | 1981-11-20 | 1981-11-20 | Electret transducer with variable actual air gap |
US06/323,667 US4429189A (en) | 1981-11-20 | 1981-11-20 | Electret transducer with a selectively metalized backplate |
US06/323,697 US4429193A (en) | 1981-11-20 | 1981-11-20 | Electret transducer with variable effective air gap |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2110054A GB2110054A (en) | 1983-06-08 |
GB2110054B true GB2110054B (en) | 1985-09-25 |
Family
ID=27559720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08232811A Expired GB2110054B (en) | 1981-11-20 | 1982-11-17 | Directional acoustic transducers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2110054B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK155269C (en) * | 1986-07-17 | 1989-07-24 | Brueel & Kjaer As | Pressure gradient |
-
1982
- 1982-11-17 GB GB08232811A patent/GB2110054B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2110054A (en) | 1983-06-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE20 | Patent expired after termination of 20 years |
Effective date: 20021116 |