GB303470A - Improvements in or relating to acoustic devices - Google Patents
Improvements in or relating to acoustic devicesInfo
- Publication number
- GB303470A GB303470A GB2622827A GB2622827A GB303470A GB 303470 A GB303470 A GB 303470A GB 2622827 A GB2622827 A GB 2622827A GB 2622827 A GB2622827 A GB 2622827A GB 303470 A GB303470 A GB 303470A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- loud
- diaphragms
- fixed surfaces
- relating
- 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
- 238000013016 damping Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
303,470. Gramophone Co., Ltd., and Hallawell, A. M. Oct. 4, 1927. Loud-speakes; magnetic instruments; diaphragms.-A loud-speaker or other acoustic device. having an unthrottled diaphragm has one or more fixed surfaces arranged adjacent to the diaphragm at such a distance as to avoid appreciable air damping. Fig. 1 shows a circular disc 11 and an annular disc 14 supported by screws on radial arms 8 above a coil-driven flat diaphragm 1. The discs 11, 14 are adjusted till the resonance due to the air spaces between them and the diaphragm corresponds to frequencies at which there is a dip in the frequency-response curve of the diaphragm. The fixed surfaces may take the form of solid bodies, and the invention may be applied to certain types of non-flat diaphragms. Specification 288,276 is disclaimed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2622827A GB303470A (en) | 1927-10-04 | 1927-10-04 | Improvements in or relating to acoustic devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2622827A GB303470A (en) | 1927-10-04 | 1927-10-04 | Improvements in or relating to acoustic devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB303470A true GB303470A (en) | 1929-01-04 |
Family
ID=10240334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2622827A Expired GB303470A (en) | 1927-10-04 | 1927-10-04 | Improvements in or relating to acoustic devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB303470A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE975174C (en) * | 1953-11-26 | 1961-09-14 | Krone Kg | Device for smoothing the frequency response of the transmission rate of a microphone |
-
1927
- 1927-10-04 GB GB2622827A patent/GB303470A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE975174C (en) * | 1953-11-26 | 1961-09-14 | Krone Kg | Device for smoothing the frequency response of the transmission rate of a microphone |
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