IT500018A - - Google Patents
Info
- Publication number
- IT500018A IT500018A IT500018DA IT500018A IT 500018 A IT500018 A IT 500018A IT 500018D A IT500018D A IT 500018DA IT 500018 A IT500018 A IT 500018A
- Authority
- IT
- Italy
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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
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- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
- H04R1/086—Protective screens, e.g. all weather or wind screens
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Exhaust Silencers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP5919A DE923354C (de) | 1951-07-24 | 1951-07-24 | UEberholungssignalanlage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT500018A true IT500018A (en:Method) |
Family
ID=6626604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT500018D IT500018A (en:Method) | 1951-07-24 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE923354C (en:Method) |
| FR (2) | FR1047370A (en:Method) |
| GB (2) | GB705450A (en:Method) |
| IT (1) | IT500018A (en:Method) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2931020A (en) * | 1955-07-11 | 1960-03-29 | Thomas J Bender | Secondary alarm system |
| DE1112927B (de) * | 1956-05-08 | 1961-08-17 | Tele F Lux Soc A R L | Verfahren zur elektrischen UEbertragung von akustischen UEberholsignalen von Fahrzeugen |
| US3670689A (en) * | 1970-03-20 | 1972-06-20 | Falcon Safety Prod | Tilt-operated hand held gas powered acoustic device |
| DE10003689C1 (de) * | 2000-01-28 | 2001-05-23 | Hella Kg Hueck & Co | Schaltungsanordnung zur Leistungsanpassung einer Verstärkeranlage zur Erzielung eines annähernd konstanten Schalldruckpegels des Sondersignals für vorfahrtberechtigte Wegebenutzer |
| DE102017220474A1 (de) * | 2017-11-16 | 2019-05-16 | Robert Bosch Gmbh | Vorrichtung zur luftschallakustischen Sensierung der Umgebung eines Fahrzeugs, Fahrzeug |
| EP3907502B1 (en) | 2020-05-08 | 2025-07-02 | ABB Schweiz AG | Sensing arrangement |
| CN115255650B (zh) * | 2022-08-12 | 2024-12-24 | 国网江苏省电力有限公司泰州供电分公司 | 一种用于声纹监测的聚音装置及制备方法 |
-
0
- IT IT500018D patent/IT500018A/it unknown
-
1951
- 1951-07-24 DE DEP5919A patent/DE923354C/de not_active Expired
- 1951-12-28 FR FR1047370D patent/FR1047370A/fr not_active Expired
-
1952
- 1952-01-08 GB GB622/52A patent/GB705450A/en not_active Expired
- 1952-07-08 FR FR64910D patent/FR64910E/fr not_active Expired
- 1952-07-23 GB GB18697/52A patent/GB717090A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB717090A (en) | 1954-10-20 |
| GB705450A (en) | 1954-03-10 |
| FR1047370A (fr) | 1953-12-14 |
| DE923354C (de) | 1955-02-10 |
| FR64910E (fr) | 1955-12-14 |