US3293379A - Earphone - Google Patents
Earphone Download PDFInfo
- Publication number
- US3293379A US3293379A US295032A US29503263A US3293379A US 3293379 A US3293379 A US 3293379A US 295032 A US295032 A US 295032A US 29503263 A US29503263 A US 29503263A US 3293379 A US3293379 A US 3293379A
- Authority
- US
- United States
- Prior art keywords
- housing
- earphone
- diaphragm
- cavity
- opening
- 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 - Lifetime
Links
- 230000005520 electrodynamics Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920005553 polystyrene-acrylate Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
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
Definitions
- the frictional resistance means associated with the rear openings may be arranged to be adjustable to vary the frequency response of the earphone.
- the envelope is preferably disc-shaped and may consist of one or more parts and its axis extends preferably to the axis of the magnet system or its housing.
- the envelope may consist of metal or plastics, preferably thermoplastics, such as polystyrene or polymethacrylate resin.
- thermoplastics such as polystyrene or polymethacrylate resin.
- FIG. 1 is a sectional view taken along a diameter of the earphone and FIG. 2 a fragmentary sectional view illustrating a detail.
- the frequency response of the earphone may be modified by an adjustment of the frictional acoustic resistance 9, e.g., by means of a ring 10, as is shown in FIG. 2.
- the ring 10 extends through 360 and has holes, which are in registry with or offset from the holes 8, depending on the adjustment of the ring 10.
- the adjustment of the effective area and Consequently of the resistance value of a frictional acoustic resistance element such as screen 9 by means of a ring adjoining one side of the resistance element and rotatable relative to another part such as 4 adjoining the other side of the resistance element so that holes through the ring can be moved as desired into and out of registry with holes such as 8 through said other part is described in the Austrian patent specification No. 186,691 issued November 27, 1954, and shown in FIGS. 3 and 4 thereof.
- the front and rear members 3 and 4 of the earphone form a peripheral joint 1 and the diaphragm 1 has a rim portion 12 gripped between said members 3 and 4 at the joint.
- An earphone according to claim 1 wherein said rear plate member includes at least one opening defined therethrough having an adjustable frictional resistance in said opening, said opening establishing a connection between the back of said diaphragm and the outside air.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
Description
Dec. 20, 1966 @(jR K 3,293,379
EARPHONE Original Filed Jan. 17. 1961 IN VE NTOR Rudolf y Gb'P/kc United States Patent 3,293,379 EARPHONE Rudolf Giirike, 57c Sternwartestrasse, Vienna, Austria Original application Jan. 17, 1961, Ser. No. 83,289. Divided and this application July 15, 1963, Ser. No. 295,032
Claims priority, application Austria, Jan. 23, 1960, A 496/60 4 Claims. (Cl. 179-1155) This invention relates to an earphone comprising a magnet system, a housing accommodating said magnet system, a diaphragm operable by said magnet system, and an earpiece carried by said housing. This application is a divisional application of the application Serial No. 83,289 filed January 17, 1961, and now abandoned.
The efliciency of such earphones, which convert electrical energy into sound Without requiring additional extraneous energy, is known to depend, inter alia, on the size of the sound emitting element constituted by the diaphragm.
The desire to provide such earphones with magnet systems of light weight and small size in order to reduce the overall weight and apparent size of the earphone was opposed by the previous belief that a decrease in the size of the magnet system necessitated a corresponding decrease in the size of the diaphragm and that the diaphragm diameter should approximately match the diameter of the housing of the magnet system.
The invention provides an earphone comprising a magnet system, an exposed housing distinct from and surrounding said magnet system, a diaphragm at least partly disposed radially outwardly of the periphery of said housing and operatively related to said magnet system, and an envelope comprising an earpiece and carried by said housing, said envelope defining a cavity which accommodates said diaphragm, said envelope being formed with openings which communicate with said cavity on the front and rear sides of said diaphragm.
In a preferred embodiment of the invention, frictional acoustic resistance means may be associated with the openings which communicate with said cavity on the rear side of the diaphragm. It has been found however, that even where such frictional resistance means are not provided, the volume of sound emitted through such rear openings is not disturbing in the vicinity of the earphone.
The frictional resistance means associated with the rear openings may be arranged to be adjustable to vary the frequency response of the earphone.
The envelope is preferably disc-shaped and may consist of one or more parts and its axis extends preferably to the axis of the magnet system or its housing.
Various materials are suitable for making the envelope. For instance, the same may consist of metal or plastics, preferably thermoplastics, such as polystyrene or polymethacrylate resin. An earphone having a particularly small apparent size will be obtained if parts protruding radially outwardly from the housing, including the envelope and the diaphragm, consist of transparent plastics.
An earphone illustrating the invention is shown on the accompanying drawing, in which FIG. 1 is a sectional view taken along a diameter of the earphone and FIG. 2 a fragmentary sectional view illustrating a detail.
With reference to the drawing, a diaphragm 1 is accommodated in a cavity 2 defined by an earpiece envelope consisting of a front plate or earpiece 3 and a rear member or plate 4. The envelope defines a diaphragm cavity for the diaphragm 1 which protrudes radially outwardly from a housing 5, which is smaller in diameter than the diaphragm 1. A magnet system 6 is accommodated in the housing 5. The earpiece 3 is [formed with openings 7, which communicate with the cavity 2 on the front side of .the diaphragm 1. The rear member 4 is formed with openings 8, which communicate with the cavity 2 on the rear side of the diaphragm 1 and which may be covered by a screen 9 constituting a frictional acoustic resistance.
The frequency response of the earphone may be modified by an adjustment of the frictional acoustic resistance 9, e.g., by means of a ring 10, as is shown in FIG. 2.
The ring 10 extends through 360 and has holes, which are in registry with or offset from the holes 8, depending on the adjustment of the ring 10. The adjustment of the effective area and Consequently of the resistance value of a frictional acoustic resistance element such as screen 9 by means of a ring adjoining one side of the resistance element and rotatable relative to another part such as 4 adjoining the other side of the resistance element so that holes through the ring can be moved as desired into and out of registry with holes such as 8 through said other part is described in the Austrian patent specification No. 186,691 issued November 27, 1954, and shown in FIGS. 3 and 4 thereof.
The front and rear members 3 and 4 of the earphone form a peripheral joint 1 and the diaphragm 1 has a rim portion 12 gripped between said members 3 and 4 at the joint.
What I claim is:
1. An earphone comprising a housing having a top opening, an ear piece envelope including a rear plate portion having a substantially central opening with an opening bounding wall peripherally connected to said housing adjacent the top thereof and also having a front plate portion, said piece envelope defining an internal cavity above said housing and extending radially outwardly beyond said housing, a greatly miniaturized electrodynamic drive system in said housing, and a diphragm of substantially normal size disposed in said cavity.
2. An earphone according to claim 1 wherein said rear plate member includes at least one opening defined therethrough having an adjustable frictional resistance in said opening, said opening establishing a connection between the back of said diaphragm and the outside air.
3. An earphone as set forth in claim 1, in which said diaphragm and said envelope consist of transparent material. 4. An earphone as set forth in claim 1, in which said envelope comprises separate front and rear plate members defining a cavity therebetween forming a peripheral joint and said diaphragm having rim portion gripped between said members at said joint.
References Cited by the Examiner UNITED STATES PATENTS 2,506,608 5/1950 McLoad 179179 2,540,498 2/ 1951 Tallman 179180 X FOREIGN PATENTS 186,691 9/1956 Austria.
KATHLEEN H. CLAFF Y, Primary Examiner. F. N CARTEN, Assistant Examiner.
Claims (1)
1. AN EARPHONE COMPRISING A HOUSING HAVING A TOP OPENING, AN EAR PIECE ENVELOPE INCLUDING A REAR PLATE PORTION HAVING A SUBSTANTIALLY CENTRAL OPENING WITH AN OPENING BOUNDING WALL PERIPHERALLY CONNECTED TO SAID HOUSING ADJACENT THE TOP THEREOF AND ALSO HAVING A FRONT PLATE PORTION, SAID PIECE ENVELOPE DEFINING AN INTERNAL CAVITY ABOVE SAID HOUSING AND EXTENDING RADIALLY OUTWARDLY BEYOND SAID HOUSING, A GREATLY MINIATURIZED ELECTRODYNAMIC DRIVE SYSTEM IN SAID HOUSING, AND A DIPHRAGM OF SUBSTANTIALLY NORMAL SIZE DISPOSED IN SAID CAVITY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US295032A US3293379A (en) | 1961-01-17 | 1963-07-15 | Earphone |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8328961A | 1961-01-17 | 1961-01-17 | |
US295032A US3293379A (en) | 1961-01-17 | 1963-07-15 | Earphone |
Publications (1)
Publication Number | Publication Date |
---|---|
US3293379A true US3293379A (en) | 1966-12-20 |
Family
ID=26769137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US295032A Expired - Lifetime US3293379A (en) | 1961-01-17 | 1963-07-15 | Earphone |
Country Status (1)
Country | Link |
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US (1) | US3293379A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356796A (en) * | 1964-08-11 | 1967-12-05 | Gen Motors Corp | Field case assembly for loudspeaker |
US3381773A (en) * | 1966-03-30 | 1968-05-07 | Philips Corp | Acoustic resistance |
US4315112A (en) * | 1979-12-12 | 1982-02-09 | Alan Hofer | Speaker |
US4403120A (en) * | 1980-06-30 | 1983-09-06 | Pioneer Electronic Corporation | Earphone |
US4926486A (en) * | 1987-07-17 | 1990-05-15 | Barsumian Bruce R | Transducer assembly for automatic message system |
US20060104471A1 (en) * | 2004-10-20 | 2006-05-18 | Sony Corporation | Headphone apparatus |
US20120321102A1 (en) * | 2010-12-22 | 2012-12-20 | Samsung Electronics Co., Ltd. | Method and apparatus creating a personal sound zone |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2506608A (en) * | 1947-07-23 | 1950-05-09 | Kenneth W Mcload | Piezoelectric transducer |
US2540498A (en) * | 1949-03-18 | 1951-02-06 | Bell Telephone Labor Inc | Microphone damping system having rear openings |
AT186691B (en) * | 1954-11-27 | 1956-09-10 | Henry Radio Heinrich & Co | Acoustic frictional resistance |
-
1963
- 1963-07-15 US US295032A patent/US3293379A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2506608A (en) * | 1947-07-23 | 1950-05-09 | Kenneth W Mcload | Piezoelectric transducer |
US2540498A (en) * | 1949-03-18 | 1951-02-06 | Bell Telephone Labor Inc | Microphone damping system having rear openings |
AT186691B (en) * | 1954-11-27 | 1956-09-10 | Henry Radio Heinrich & Co | Acoustic frictional resistance |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356796A (en) * | 1964-08-11 | 1967-12-05 | Gen Motors Corp | Field case assembly for loudspeaker |
US3381773A (en) * | 1966-03-30 | 1968-05-07 | Philips Corp | Acoustic resistance |
US4315112A (en) * | 1979-12-12 | 1982-02-09 | Alan Hofer | Speaker |
US4403120A (en) * | 1980-06-30 | 1983-09-06 | Pioneer Electronic Corporation | Earphone |
US4926486A (en) * | 1987-07-17 | 1990-05-15 | Barsumian Bruce R | Transducer assembly for automatic message system |
US20060104471A1 (en) * | 2004-10-20 | 2006-05-18 | Sony Corporation | Headphone apparatus |
US20120321102A1 (en) * | 2010-12-22 | 2012-12-20 | Samsung Electronics Co., Ltd. | Method and apparatus creating a personal sound zone |
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