GB202938A - Improvements in acoustic apparatus - Google Patents
Improvements in acoustic apparatusInfo
- Publication number
- GB202938A GB202938A GB1856523A GB1856523A GB202938A GB 202938 A GB202938 A GB 202938A GB 1856523 A GB1856523 A GB 1856523A GB 1856523 A GB1856523 A GB 1856523A GB 202938 A GB202938 A GB 202938A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- tuned
- oscillations
- diaphragm
- frequency
- 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
- 230000010355 oscillation Effects 0.000 abstract 2
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)
Abstract
202,938. Baron, H., (Signal Ges.). Feb. 6,1923. Soundboxes.-Comprises the use in gramophones, telephones, microphones, megaphones, motor horns and the like of one or more tuned air-chambers, such as a Helmholtz resonator, for receiving sound energy from the air or transferring sound energy to the air, interposed between the sound-emitting or receiving point and the medium, and tuned to the frequency to be transferred or to mean speech-frequency. The air chamber 1 is closed on one side by a diaphragm 2, which is excited or damped by the magnetic system 3, 4, and opens into the free medium on the other side. The air chamber may be the only resonant part of the apparatus, or it may be associated with a tuned diaphragm or the like, the pitch of the latter being preferably the same as that of the chamber. The conditions may be so adjusted that one of the resonance frequencies of the system as a whole may lie below 700 and the other above 800 oscillations, so as to give a resonance band from about 500 to 1000 or 2000 oscillations. Reference has been directed by the Comptroller to Specifications 2909/77, 24809/05, 7654/06, 110,759, and 148,759 and 149,324, [both in Class 118 (ii), Signals].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1856523A GB202938A (en) | 1922-02-06 | 1922-02-06 | Improvements in acoustic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1856523A GB202938A (en) | 1922-02-06 | 1922-02-06 | Improvements in acoustic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB202938A true GB202938A (en) | 1923-08-07 |
Family
ID=10114628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1856523A Expired GB202938A (en) | 1922-02-06 | 1922-02-06 | Improvements in acoustic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB202938A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0025955A1 (en) * | 1979-09-19 | 1981-04-01 | Siemens Aktiengesellschaft | Piezo-electric ringing transducer |
-
1922
- 1922-02-06 GB GB1856523A patent/GB202938A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0025955A1 (en) * | 1979-09-19 | 1981-04-01 | Siemens Aktiengesellschaft | Piezo-electric ringing transducer |
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