WO2000042813A1 - Passives mikrofon mit drahtloser übertragung - Google Patents
Passives mikrofon mit drahtloser übertragung Download PDFInfo
- Publication number
- WO2000042813A1 WO2000042813A1 PCT/DE1999/002524 DE9902524W WO0042813A1 WO 2000042813 A1 WO2000042813 A1 WO 2000042813A1 DE 9902524 W DE9902524 W DE 9902524W WO 0042813 A1 WO0042813 A1 WO 0042813A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- receiving unit
- wireless transmission
- sound information
- signals
- passive microphone
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 33
- 230000005284 excitation Effects 0.000 claims abstract description 59
- 239000012528 membrane Substances 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 5
- 230000010355 oscillation Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 230000007704 transition Effects 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
Definitions
- the present invention relates to a microphone for detecting acoustic signals, converting the acoustic signals into electrical signals and transmitting the electrical signals to a receiving unit.
- Known microphones of this type are usually supplied with energy via a connecting line or a cable, via which the electrical signals are transmitted to the receiving unit, or have active electronic components and their own energy supply in the form of a battery.
- Microphones in which the electrical signals are transmitted to a receiving unit via a wireless transmission for example radio microphones, must have their own battery or their own rechargeable battery, which provides the energy required for signal processing and signal transmission.
- the reception unit is, for example, a telephone base station that is connected to a fixed line network, but can also be a mobile station of a wireless telecommunications system.
- a cable connection between the headset and the telephone base station is disadvantageous in many applications due to the restriction of freedom of movement.
- the provision of a separate power supply for the microphone of the headset in the form of a battery is not reasonable for a user due to the increased weight.
- neither of the two known solutions is practicable, since on the one hand a cable connection between the microphone and the telephone restricts the driver's freedom of movement and visibility and, on the other hand, prolonged wearing of a heavy microphone is disruptive when driving a car.
- the microphone of a free Intercom system in a motor vehicle should be as close as possible to the mouth of the speaker in order to keep disturbances caused by loud driving noises as low as possible.
- the object of the present invention is therefore to provide a microphone for the transmission of sound information to a receiving unit which is simple and easy to set up and at the same time enables the sound information to be transmitted wirelessly to the receiving unit.
- a passive microphone for the wireless transmission of sound information to a receiving unit according to claim 1, which has a piezoelectric device for receiving and storing excitation energy from the receiving unit and for wireless transmission of electrical signals converted from detected acoustic signals to the receiving unit having.
- the microphone according to the invention is a passive microphone, ie there is no separate energy supply and the transmission of sound signals carrying electrical information from the microphone to the receiving unit takes place by means of continuous or discontinuous energy transmission in the form of an electromagnetic signal by the receiving unit.
- the microphone according to the invention is thus light and simply constructed and still enables wireless transmission of electrical signals.
- the piezoelectric device advantageously stores the excitation energy from the receiving unit in the form of mechanical vibrations. Furthermore, a particularly light and simple construction can be achieved if the piezoelectric device serves simultaneously to store the electromagnetic excitation energy, to detect acoustic signals and to convert electrical signals carrying detected acoustic signals into sound information.
- the passive microphone according to the invention essentially comprises only the piezoelectric device, whereby a particularly simple, light and inexpensive construction is possible.
- the piezoelectric device can therefore, for. B. consist essentially of a piezoelectric membrane. The excitation energy from the receiving unit is then picked up via the antenna of the microphone and converted into mechanical vibrations of the membrane.
- the piezoelectric device can comprise a device for detecting acoustic signals and a device for storing the electromagnetic excitation energy and for converting detected acoustic signals into electrical signals carrying acoustic information.
- the device for detecting the acoustic signals can, for example, essentially consist of a membrane, advantageously of metal.
- Figure 1 is a schematic representation of a microphone according to the present invention and an associated receiving unit, and
- a converter 9 coupled to the antenna 5 is provided on the membrane 8 for converting the received excitation pulses into an acoustic surface wave.
- the converter 9 is connected to a ground. Similar to the reflectors 10, the converter 9 consists of metal structures applied to the membrane 8, e.g. B. made of aluminum.
- the membrane When a high-frequency excitation is received by the receiving unit 6, the membrane is excited to vibrate via the converter 9 by forming an acoustic surface wave. The vibrations on the top of the membrane expand in both directions towards the reflector fields 10 and are reflected by them, so that a standing wave is formed in the event of resonance. In this way, the excitation energy of the excitation pulse is stored by the receiving unit 6 in the form of mechanical vibrations.
- the piezoelectric element is excited discontinuously, for example by a pulsed excitation signal.
- a pulsed excitation signal for example, it is also possible to find favorable continuous excitation signals.
- the membrane 8 is a quartz membrane which has a very high quality, an impulse response which is very long in the time domain is generated in the form of a decaying oscillation and transmitted back to the receiving unit 6.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99952376A EP1142444B1 (de) | 1999-01-11 | 1999-08-12 | Passives mikrofon mit drahtloser übertragung |
DE59907398T DE59907398D1 (de) | 1999-01-11 | 1999-08-12 | Passives mikrofon mit drahtloser übertragung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19900633.4 | 1999-01-11 | ||
DE19900633 | 1999-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000042813A1 true WO2000042813A1 (de) | 2000-07-20 |
Family
ID=7893893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/002524 WO2000042813A1 (de) | 1999-01-11 | 1999-08-12 | Passives mikrofon mit drahtloser übertragung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1142444B1 (de) |
DE (1) | DE59907398D1 (de) |
WO (1) | WO2000042813A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2111331A5 (de) * | 1970-10-14 | 1972-06-02 | Matsushita Electric Ind Co Ltd | |
GB2025733A (en) * | 1978-07-17 | 1980-01-23 | Siemens Ag | Electro-acoustic transducer |
JPH02278996A (ja) * | 1989-04-19 | 1990-11-15 | Matsushita Electric Ind Co Ltd | ワイヤレスマイクロホン |
JPH05129872A (ja) * | 1991-11-07 | 1993-05-25 | Hitachi Ltd | 表面波共振子、表面波フイルタ、分波器および移動無線装置 |
DE19520674A1 (de) * | 1995-06-07 | 1996-12-12 | Burkhard Weis | Verfahren und Vorrichtung zur kontinuierlichen Kontrolle des Reifendruckes von Fahrzeugreifen während der Fahrt |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH664659A5 (en) * | 1987-03-14 | 1988-03-15 | Erwin Meister | Throat microphone with round bracket with tongue at one end - contg. round piezoelectric resonator as transducer and sound damping parts |
-
1999
- 1999-08-12 EP EP99952376A patent/EP1142444B1/de not_active Expired - Lifetime
- 1999-08-12 DE DE59907398T patent/DE59907398D1/de not_active Expired - Lifetime
- 1999-08-12 WO PCT/DE1999/002524 patent/WO2000042813A1/de active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2111331A5 (de) * | 1970-10-14 | 1972-06-02 | Matsushita Electric Ind Co Ltd | |
GB2025733A (en) * | 1978-07-17 | 1980-01-23 | Siemens Ag | Electro-acoustic transducer |
JPH02278996A (ja) * | 1989-04-19 | 1990-11-15 | Matsushita Electric Ind Co Ltd | ワイヤレスマイクロホン |
JPH05129872A (ja) * | 1991-11-07 | 1993-05-25 | Hitachi Ltd | 表面波共振子、表面波フイルタ、分波器および移動無線装置 |
DE19520674A1 (de) * | 1995-06-07 | 1996-12-12 | Burkhard Weis | Verfahren und Vorrichtung zur kontinuierlichen Kontrolle des Reifendruckes von Fahrzeugreifen während der Fahrt |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 046 (E - 1029) 4 February 1991 (1991-02-04) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 504 (E - 1430) 10 September 1993 (1993-09-10) * |
Also Published As
Publication number | Publication date |
---|---|
DE59907398D1 (de) | 2003-11-20 |
EP1142444B1 (de) | 2003-10-15 |
EP1142444A1 (de) | 2001-10-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69531838T2 (de) | Kommunikations-kopfhörer | |
DE102007046031B4 (de) | Ultraschallsensor | |
DE69926810T2 (de) | System der automatischen zeiteinstellung eines tragbaren gegenstandes mit einer uhrenfunktion | |
EP0390386A3 (de) | Vorrichtung zur Lärmverminderung | |
CH668341A5 (de) | Hoergeraet. | |
DE10144877A1 (de) | Sensor zur Sitzbelegungserkennung | |
CN102547519A (zh) | 具有多个用户感觉传感器的手持电子设备与方法 | |
DE602005005305T2 (de) | Fernbedienungssystem für Kraftfahrzeug mit Beschleunigungssensor und/oder Drucksensor | |
DE102007039879A1 (de) | Anordnung zur Ankopplung und Aufnahme eines Mobiltelefons innerhalb eines Kraftfahrzeugs | |
DE102007003165A1 (de) | Flächenlautsprecher sowie Verfahren zur Einstellung des Schwingverhaltens eines Schwingsystems | |
DE10203855B4 (de) | Schwinggyroskop und Temperaturdrift-Einstellverfahren für dasselbe | |
WO2000042813A1 (de) | Passives mikrofon mit drahtloser übertragung | |
DE102014101881B4 (de) | Audioausgabeeinrichtung und Verfahren zum Bestimmen eines Lautsprecherkegelhubs | |
DE102013001323B3 (de) | Kraftfahrzeug mit Kommunikationseinrichtung | |
DE102015209234A1 (de) | Vorrichtung zum Aussenden und/oder Empfangen akustischer Signale | |
WO2002023946A2 (de) | Flachlautsprecher | |
CN211481328U (zh) | 功能手机的模拟信号处理模块 | |
DE2831401A1 (de) | Elektroakustischer wandler | |
DE102020123100A1 (de) | Systeme und verfahren für einen piezoelektrischen membranwandler für automobilmikrofonanwendungen | |
JPH11298988A (ja) | マイクロフォンの指向特性を制御する装置 | |
WO1996023381A1 (de) | Sende-/empfangsanordnung für mobilfunk | |
CN1387387A (zh) | 振荡防止电路 | |
JP2640098B2 (ja) | 自動車電話用マイクロホン | |
DE102019206381B3 (de) | Übertragungssystem zum Übertragen eines Audiosignals zu einem Hörer mittels Körperschall | |
KR890003245A (ko) | 전기 음향 변환기 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN IN JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999952376 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1999952376 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09889100 Country of ref document: US |
|
WWG | Wipo information: grant in national office |
Ref document number: 1999952376 Country of ref document: EP |