GB549311A - Improvements in listening or sound-locating apparatus - Google Patents
Improvements in listening or sound-locating apparatusInfo
- Publication number
- GB549311A GB549311A GB755441A GB755441A GB549311A GB 549311 A GB549311 A GB 549311A GB 755441 A GB755441 A GB 755441A GB 755441 A GB755441 A GB 755441A GB 549311 A GB549311 A GB 549311A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- chamber
- baffle
- central
- locating
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
549,311. Locating sounds. HERZMARK, N. June 14, 1941, No. 7554. [Class 118 (ii)] A sound-collecting cell for a sound-locating apparatus comprises a frusto-conical mouth 45, Fig. 12, leading into a spherical chamber 46 from which a tapering throat 47 extends to a tube 47a connected to an ear-piece. The chamber 46 is provided internally with a baffle 50 of lenticular shape and of a diameter approximately one third that of the chamber, this baffle being located in the central traverse plane of the chamber. To eliminate disturbing noises, the mouth 45 of the cell may be fitted with a deflector comprising a central funnel 52 with radical vanes 53. Two of these cells may be mounted at opposite ends of a beam which can be turned about a central axis for ascertaining the bearing of a sound source. Preferably separate apparatus is used for determining the azimuth and elevation, respectively, of the sound source. A listening post may consist of a sound-insulated cabin provided with a number of the sound-collecting cells oriented in different directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB755441A GB549311A (en) | 1941-06-14 | 1941-06-14 | Improvements in listening or sound-locating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB755441A GB549311A (en) | 1941-06-14 | 1941-06-14 | Improvements in listening or sound-locating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB549311A true GB549311A (en) | 1942-11-16 |
Family
ID=9835353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB755441A Expired GB549311A (en) | 1941-06-14 | 1941-06-14 | Improvements in listening or sound-locating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB549311A (en) |
-
1941
- 1941-06-14 GB GB755441A patent/GB549311A/en not_active Expired
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