GB1351494A - Automobile vehicles electroacoustical warning devices - Google Patents
Automobile vehicles electroacoustical warning devicesInfo
- Publication number
- GB1351494A GB1351494A GB1080671*[A GB1080671A GB1351494A GB 1351494 A GB1351494 A GB 1351494A GB 1080671 A GB1080671 A GB 1080671A GB 1351494 A GB1351494 A GB 1351494A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pitched sounds
- length
- vibrating diaphragm
- piece
- april
- 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
- 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
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
1351494 Electric horns FABRICA ESPANOLA MAGNETOS SA 22 April 1971 [30 April 1970] 10806/71 Heading G5J An electro-acoustic warning device, Fig. 1, of the type having a vibrating diaphragm (crosssectional area S 1 ) a resonator tube (crosssectional area S 2 ; length l 1 ) and a bell formed of a conical portion (length l 2 ) and an exponentially shaped portion (length l 3 ) the maximum cross-sectional area of said portions being S 3 and S 4 respectively, is made to obey the following relationships, all measurements being in centimeter units (S 3 - S 2 )/l 2 = 0À9 for low pitched sounds 1À1 for high pitched sounds # 0 /l 3 = 17 for low pitched sounds 14 for high pitched sounds and S 4 /S 3 = 11À6 wherein # 0 is the wavelength in cm. of the device's fundamental frequency. For good operation the following should also apply, the coefficient being given within a tolerance of 10% and the parameters being measured in centimeters : where V 2 is the volume (cm.<SP>3</SP>) of the compression chamber. The horn may have a flat plastics piece, e.g. polypropylene, in the trumpet mouth to lie across the mouth to cause the sound output to transmit therethrough to attenuate high frequencies. The thickness of the piece is less than # 0 . To reduce the magnetic reluctance a flanged collar may be inserted between the vibrating diaphragm and the windings so as to increase the "inter gap surface". A special piece made of plastics, e.g. Bakelite (Registered Trade Mark), Fig. 6 (not shown), seats the vibrating diaphragm and is supported on the body.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES379241A ES379241A1 (en) | 1970-04-30 | 1970-04-30 | Automobile vehicles electroacoustical warning devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1351494A true GB1351494A (en) | 1974-05-01 |
Family
ID=8455788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1080671*[A Expired GB1351494A (en) | 1970-04-30 | 1971-04-22 | Automobile vehicles electroacoustical warning devices |
Country Status (3)
Country | Link |
---|---|
ES (1) | ES379241A1 (en) |
FR (1) | FR2120618A5 (en) |
GB (1) | GB1351494A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723693A1 (en) * | 1987-07-17 | 1989-01-26 | Hella Kg Hueck & Co | SIGNALHORN |
WO2001057848A1 (en) * | 2000-02-04 | 2001-08-09 | Stebel Spa | Signal-horn |
-
1970
- 1970-04-30 ES ES379241A patent/ES379241A1/en not_active Expired
-
1971
- 1971-04-22 GB GB1080671*[A patent/GB1351494A/en not_active Expired
- 1971-04-30 FR FR7115634A patent/FR2120618A5/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723693A1 (en) * | 1987-07-17 | 1989-01-26 | Hella Kg Hueck & Co | SIGNALHORN |
WO2001057848A1 (en) * | 2000-02-04 | 2001-08-09 | Stebel Spa | Signal-horn |
Also Published As
Publication number | Publication date |
---|---|
DE2121261B2 (en) | 1975-10-16 |
ES379241A1 (en) | 1972-10-16 |
FR2120618A5 (en) | 1972-08-18 |
DE2121261A1 (en) | 1971-11-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Hawkins et al. | The masking of pure tones and of speech by white noise | |
MY100723A (en) | Earphones | |
EP0339470A3 (en) | Electroacoustic driving circuit | |
GB1348745A (en) | Electroacoustic transducers | |
GB1363550A (en) | Electro-acoustic transducer device | |
JPS62198797U (en) | ||
US5103482A (en) | Apparatus and method for reproducing high fidelity sound | |
US2604182A (en) | Loud-speaker with a tapered horn coupled to the speaker diaphragm | |
GB1351494A (en) | Automobile vehicles electroacoustical warning devices | |
GB536969A (en) | Improvements in voice translating microphones | |
GB963853A (en) | Loudspeakers | |
GB1334449A (en) | Acoustic coupler | |
JPS5726987A (en) | Earphone | |
JPH0834644B2 (en) | Speaker system | |
US2190466A (en) | Telephone substation apparatus | |
JP2580383B2 (en) | Speaker system | |
JPS52139414A (en) | Non-directional horn speaker | |
JPS52111714A (en) | Electrokinetic type electroacoustic transducer with metallic vibr ating plate | |
US2428147A (en) | Electric megaphone | |
JPS5991090U (en) | Open air headphone | |
JPH04334297A (en) | Digital microphone | |
JPS546523A (en) | Diaphragm of speakers | |
GB609548A (en) | Improvements relating to motor vehicle and other horns | |
GB913686A (en) | Improvements relating to horn loud speakers | |
JPS6025118Y2 (en) | sound device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed |