ES337233A1 - Electrodynamic microphone having an adjustable tube for changing the directional characteristic of the microphone - Google Patents
Electrodynamic microphone having an adjustable tube for changing the directional characteristic of the microphoneInfo
- Publication number
- ES337233A1 ES337233A1 ES337233A ES337233A ES337233A1 ES 337233 A1 ES337233 A1 ES 337233A1 ES 337233 A ES337233 A ES 337233A ES 337233 A ES337233 A ES 337233A ES 337233 A1 ES337233 A1 ES 337233A1
- Authority
- ES
- Spain
- Prior art keywords
- sleeve
- casing
- microphone
- capsule
- apertures
- 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
-
- 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Telephone Set Structure (AREA)
Abstract
In an electrodynamic microphone, a sleeve may be moved, from a first position in which it seals the rear of a microphone capsule and inhibits entry of sound at the rear, to a second position in which sound can enter at the rear. In the first position the microphone has an omnidirectional characteristic while in the second position it has a cardioid characteristic. A housing 1 (Fig. 1), comprises a soundpermeable cap 2 fitted to a tubular metal casing 3. The diaphragm 5 of a microphone capsule 4 communicates with outside air through a protective member 6 and, in one position of a sleeve 8, through ducts (not shown) at the rear 7 of the capsule 4. The sleeve 8 is urged by a spring 9 against a rubber ring 10 at the capsule rear 7. The casing 3 is encircled by a rotatable collar 11 (Fig. 2) in which is a plastics sleeve 12. A recess 13 in the sleeve 12 receives a lug 14 inside the collar 11. An inclined surface 15a of the sleeve 12 bears on a pin 15b disposed in a longitudinal slot 16 in the casing 3 and screwed to the sleeve 8. Rotation of members 11, 12 forces the pin 15b to move forwards or backwards over the cam surface 15a, whereby the sleeve 8 engages or disengages the ring 10 to close or open the capsule rear 7. Alternatively, the casing (3), Fig. 3 (not shown), encloses a tightly fitting rotatable sleeve (8). A pin (15) secured to the sleeve (8) is movable in a transverse slot in the casing (8). The end of the sleeve (8) facing the capsule (4) has eccentric apertures (18) covered with gauze (19) and which in one position co-operate with apertures in the front of the casing (3) which in turn communicate with the rear of the diaphragm (5). The sleeve wall has apertures (20), which may contain acoustic resistance, and which in one position co-operate with apertures (21) in the wall of the casing (3). In one position of the sleeve (8) the apertures (18, 20, 21) are such that sound can reach the rear of the diaphragm (5).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6604014A NL6604014A (en) | 1966-03-26 | 1966-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES337233A1 true ES337233A1 (en) | 1968-02-16 |
Family
ID=19796103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES337233A Expired ES337233A1 (en) | 1966-03-26 | 1967-02-24 | Electrodynamic microphone having an adjustable tube for changing the directional characteristic of the microphone |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3527902A (en) |
| AT (1) | AT276515B (en) |
| BE (1) | BE696120A (en) |
| CH (1) | CH454227A (en) |
| DE (1) | DE1512734B2 (en) |
| ES (1) | ES337233A1 (en) |
| GB (1) | GB1133049A (en) |
| NL (1) | NL6604014A (en) |
| SE (1) | SE318611B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770911A (en) * | 1972-07-21 | 1973-11-06 | Industrial Research Prod Inc | Hearing aid system |
| US3798390A (en) * | 1972-07-24 | 1974-03-19 | Gould Inc | Hearing aid with valved dual ports |
| JPS5910864Y2 (en) * | 1980-06-16 | 1984-04-04 | 本田技研工業株式会社 | Microphone holding device |
| USD288512S (en) * | 1985-04-24 | 1987-03-03 | Thermo-Serv, Inc. | Wine glass |
| US5410608A (en) * | 1992-09-29 | 1995-04-25 | Unex Corporation | Microphone |
| US8003878B2 (en) * | 2008-08-05 | 2011-08-23 | Gaynier David A | Electroacoustic transducer system |
| US9116178B1 (en) * | 2012-10-11 | 2015-08-25 | Reliance Controls Corporation | Circuit tester with variable volume audible voltage indication |
| USD868042S1 (en) * | 2017-04-06 | 2019-11-26 | Bing Yang | Karaoke microphone |
| USD869445S1 (en) * | 2019-05-22 | 2019-12-10 | Shenzhen Qianhai Patuoxun Network And Technology Co., Ltd | Earphone |
| USD883260S1 (en) * | 2019-12-25 | 2020-05-05 | Shenzhen Qianhai Patuoxun Network And Technology Co., Ltd | Earphone |
| USD893462S1 (en) * | 2020-03-05 | 2020-08-18 | Shenzhen Humboldt Technology Co., Ltd | Headphone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB956448A (en) * | 1959-06-24 | 1964-04-29 | Philips Electrical Ind Ltd | Improvements in or relating to electrodynamic microphones |
-
1966
- 1966-03-26 NL NL6604014A patent/NL6604014A/xx unknown
-
1967
- 1967-02-24 ES ES337233A patent/ES337233A1/en not_active Expired
- 1967-03-21 US US624942A patent/US3527902A/en not_active Expired - Lifetime
- 1967-03-22 DE DE1967N0030204 patent/DE1512734B2/en active Granted
- 1967-03-23 CH CH418667A patent/CH454227A/en unknown
- 1967-03-23 SE SE4135/67A patent/SE318611B/xx unknown
- 1967-03-23 AT AT281867A patent/AT276515B/en active
- 1967-03-23 GB GB13661/67A patent/GB1133049A/en not_active Expired
- 1967-03-24 BE BE696120D patent/BE696120A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT276515B (en) | 1969-11-25 |
| GB1133049A (en) | 1968-11-06 |
| US3527902A (en) | 1970-09-08 |
| BE696120A (en) | 1967-09-25 |
| CH454227A (en) | 1968-04-15 |
| DE1512734B2 (en) | 1976-04-22 |
| NL6604014A (en) | 1967-09-27 |
| SE318611B (en) | 1969-12-15 |
| DE1512734A1 (en) | 1969-05-22 |
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