DE1512735B2 - Acoustic resistance for electroacoustic transducers - Google Patents
Acoustic resistance for electroacoustic transducersInfo
- Publication number
- DE1512735B2 DE1512735B2 DE1512735A DE1512735A DE1512735B2 DE 1512735 B2 DE1512735 B2 DE 1512735B2 DE 1512735 A DE1512735 A DE 1512735A DE 1512735 A DE1512735 A DE 1512735A DE 1512735 B2 DE1512735 B2 DE 1512735B2
- Authority
- DE
- Germany
- Prior art keywords
- support body
- acoustic
- grains
- acoustic resistance
- electroacoustic transducers
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 229920002457 flexible plastic Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Exhaust Silencers (AREA)
Description
Die Erfindung betrifft einen akustischen Widerstand für die Anwendung in elektroakustischen Wandlern, der aus einer Anzahl benachbarter gesinterter Metallkörner in einem Tragkörper besteht, die von diesem Tragkörper zusammengehalten werden.The invention relates to an acoustic resistor for use in electroacoustic transducers, which consists of a number of adjacent sintered metal grains in a support body, which is supported by this Support body are held together.
Derartige Widerstände finden häufig in Mikrophonen Anwendung. Sie bestehen aus einer Anzahl durch Sinterung zusammengebackener Körner. Bisher ist es jedoch üblich, die Sinterkörner als ein Ganzes in öffnungen aus einem mechanisch harten Material, wie Eisen oder Messing, zu pressen. Diese öffnung wird dann völlig von den Körnern ausgefüllt. Dabei ergab sich der Nachteil, daß beim Einpressen der Sinterkörner in dieses Material die Körner mechanisch verformt werden, wodurch sich auch der akustische Widerstandswert änderte.Such resistors are often used in microphones. They consist of a number through Sintering of caked grains. So far, however, it has been customary to place the sintered grains as a whole in openings from a mechanically hard material such as iron or brass. This opening will then completely filled with the grains. This resulted in the disadvantage that when the sintered grains were pressed in In this material the grains are mechanically deformed, which also increases the acoustic resistance value changed.
Die Erfindung ist dadurch gekennzeichnet, daß der Tragkörper aus einem nachgiebigen Kunststoff besteht. Bei Anwendung des nachgiebigen Kunststoffes wird der obenerwähnte Nachteil vermieden. Beim Einpressen bleiben die "Sinterkörner unverformt, wodurch der Vorteil erzielt wird, daß sich der akustische Widerstand nicht ändert.The invention is characterized in that the support body consists of a flexible plastic. When using the flexible plastic, the above-mentioned disadvantage is avoided. When pressing in the "sintered grains remain undeformed, whereby the advantage is achieved that the acoustic resistance does not change.
Bei einem Ausführungsbeispiel nach der Erfindung ist der Tragkörper ringförmig ausgebildet, wobei die
Sinterkörner in diesen Ring eingepreßt werden. Diese Ringe können 'z.B. je nach der erforderlichen Anzahl in
ein Rohr hineingeschoben werden, das nachher in einem Mikrophon angebracht wird. Unter Verwendung
von derselben Art Rohre können auf diese Weise verschiedene Mikrophonarten mit verschiedenen akustischen
Widerständen versehen werden.
Die Erfindung wird nachstehend an Hand der Zeichnung näher erläutert. Es zeigenIn one embodiment according to the invention, the support body is annular, the sintered grains being pressed into this ring. These rings can, for example, depending on the required number, be pushed into a tube which is then placed in a microphone. Using the same type of tubes, different types of microphones can be provided with different acoustic resistances in this way.
The invention is explained in more detail below with reference to the drawing. Show it
F i g. 1 und 2 Querschnitte durch akustische Widerstände nach der Erfindung undF i g. 1 and 2 cross sections through acoustic resistors according to the invention and
F i g. 3 im Längsschnitt ein Rohr mit einer Anzahl akustischer Widerstände.F i g. 3 in longitudinal section a pipe with a number of acoustic resistors.
In F i g. 1 ist auf einer ringförmigen Stahlscheibe 1 eine runde Kunststoffscheibe 2 befestigt. Diese weist verschiedene öffnungen 4 auf, in denen akustische Widerstände in Form gesinterter Metallkörner 3 angebracht sind.In Fig. 1 is on an annular steel disc 1 a round plastic disc 2 attached. This has different openings 4 in which acoustic Resistors in the form of sintered metal grains 3 are attached.
F i g. 2 zeigt ein anderes Ausführungsbeispiel, bei dem ein Metallrohr mit einem Flansch 5 auf der Innenseite mit einem Kunststoffrohr 6 versehen ist, das seinerseits einen akustischen Widerstand 7 enthält, der aus gesinterten Metallkörnern besteht.F i g. 2 shows another embodiment in which a metal pipe with a flange 5 on the inside is provided with a plastic tube 6, which in turn contains an acoustic resistor 7, the consists of sintered metal grains.
In F i g. 3 ist ein Metallrohr 10 mit verschiedenen akustischen Widerstandseinheiten versehen, die im Rohr an den erforderlichen Stellen angeordnet sind.In Fig. 3, a metal pipe 10 is provided with various acoustic resistance units which are shown in FIG Pipe are arranged in the required places.
Eine derartige Einheit besteht aus einem Kunststoffrohr 11, in dem akustisches Widerstandsmaterial 12 angebracht ist.Such a unit consists of a plastic tube 11 in which acoustic resistance material 12 is mounted is.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6604150A NL6604150A (en) | 1966-03-30 | 1966-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE1512735A1 DE1512735A1 (en) | 1969-05-14 |
| DE1512735B2 true DE1512735B2 (en) | 1975-02-20 |
Family
ID=19796133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1512735A Pending DE1512735B2 (en) | 1966-03-30 | 1967-03-23 | Acoustic resistance for electroacoustic transducers |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3381773A (en) |
| AT (1) | AT271590B (en) |
| BE (1) | BE696354A (en) |
| DE (1) | DE1512735B2 (en) |
| FR (1) | FR1515775A (en) |
| GB (1) | GB1130661A (en) |
| NL (1) | NL6604150A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1245803A (en) * | 1967-09-28 | 1971-09-08 | Matsushita Electric Ind Co Ltd | Microphone device |
| US3930560A (en) * | 1974-07-15 | 1976-01-06 | Industrial Research Products, Inc. | Damping element |
| DE3102870A1 (en) * | 1981-01-29 | 1982-08-19 | Hans-Joachim 3300 Braunschweig Gieger | HOUSING SPEAKER |
| US4837833A (en) * | 1988-01-21 | 1989-06-06 | Industrial Research Products, Inc. | Microphone with frequency pre-emphasis channel plate |
| US8615097B2 (en) | 2008-02-21 | 2013-12-24 | Bose Corportion | Waveguide electroacoustical transducing |
| US8351630B2 (en) * | 2008-05-02 | 2013-01-08 | Bose Corporation | Passive directional acoustical radiating |
| US8630435B2 (en) * | 2008-08-08 | 2014-01-14 | Nokia Corporation | Apparatus incorporating an adsorbent material, and methods of making same |
| US9078063B2 (en) | 2012-08-10 | 2015-07-07 | Knowles Electronics, Llc | Microphone assembly with barrier to prevent contaminant infiltration |
| JP6284446B2 (en) * | 2014-06-27 | 2018-02-28 | 株式会社オーディオテクニカ | Dynamic microphone and method of forming back air chamber |
| US10057701B2 (en) | 2015-03-31 | 2018-08-21 | Bose Corporation | Method of manufacturing a loudspeaker |
| US9451355B1 (en) | 2015-03-31 | 2016-09-20 | Bose Corporation | Directional acoustic device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2152205A (en) * | 1937-03-18 | 1939-03-28 | Ingersoll Rand Co | Muffler |
| US2576610A (en) * | 1944-04-10 | 1951-11-27 | Gen Motors Corp | Restricter |
| NL190970A (en) * | 1954-01-11 | |||
| US3293379A (en) * | 1961-01-17 | 1966-12-20 | Gorike Rudolf | Earphone |
| US3163256A (en) * | 1962-06-06 | 1964-12-29 | Corning Glass Works | Muffler with ceramic honeycomb baffle |
| US3163255A (en) * | 1963-04-04 | 1964-12-29 | Air Mite Devices Inc | Exhaust valve silencer with sintered metal silencing disc |
| US3270834A (en) * | 1965-09-10 | 1966-09-06 | Atlas Copco Ab | Pneumatic tool having exhaust noise reducing means |
-
1966
- 1966-03-30 NL NL6604150A patent/NL6604150A/xx unknown
-
1967
- 1967-02-21 US US617543A patent/US3381773A/en not_active Expired - Lifetime
- 1967-03-23 DE DE1512735A patent/DE1512735B2/en active Pending
- 1967-03-28 GB GB13975/67A patent/GB1130661A/en not_active Expired
- 1967-03-28 AT AT293467A patent/AT271590B/en active
- 1967-03-30 FR FR100831A patent/FR1515775A/en not_active Expired
- 1967-03-30 BE BE696354D patent/BE696354A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3381773A (en) | 1968-05-07 |
| FR1515775A (en) | 1968-03-01 |
| GB1130661A (en) | 1968-10-16 |
| DE1512735A1 (en) | 1969-05-14 |
| NL6604150A (en) | 1967-10-02 |
| AT271590B (en) | 1969-06-10 |
| BE696354A (en) | 1967-10-02 |
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