EP1119219A2 - Transducteur électroacoustique en miniature - Google Patents

Transducteur électroacoustique en miniature Download PDF

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Publication number
EP1119219A2
EP1119219A2 EP01100376A EP01100376A EP1119219A2 EP 1119219 A2 EP1119219 A2 EP 1119219A2 EP 01100376 A EP01100376 A EP 01100376A EP 01100376 A EP01100376 A EP 01100376A EP 1119219 A2 EP1119219 A2 EP 1119219A2
Authority
EP
European Patent Office
Prior art keywords
membrane
miniature
miniature transducer
acoustic
electrical
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.)
Granted
Application number
EP01100376A
Other languages
German (de)
English (en)
Other versions
EP1119219A3 (fr
EP1119219B1 (fr
Inventor
Torsten NIEDERDRÄNK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1119219A2 publication Critical patent/EP1119219A2/fr
Publication of EP1119219A3 publication Critical patent/EP1119219A3/fr
Application granted granted Critical
Publication of EP1119219B1 publication Critical patent/EP1119219B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/48—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using constructional means for obtaining a desired frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/02—Loudspeakers

Definitions

  • the invention relates to an electrical-acoustic miniature transducer.
  • Miniature electric-acoustic transducers become a change electrical used in acoustic signals.
  • such as hearing aids are made by small-sized electrical-acoustic transducers, the so-called listeners, generated acoustic output signals.
  • hearing aids are balanced and frequency characteristics of great importance.
  • the limits of the transmission behavior known Miniature electro-acoustic transducers are too high Frequencies given by the constructive transducer structure and generally place an upper limit on the transferable Frequency range.
  • the converter includes a housing which delimits an interior from an exterior, and a motor with a coil, a stack and an armature, which are essentially inside the housing.
  • the Housing consists of an upper tub with a lower one Tub is connected and has an opening. The stack extends out through the opening. It is intended that the stack is flush with the case. It is further provided that the housing has a base and the Opening is arranged on this base.
  • the transducer system behaves above the highest resonance frequency determined by mass and shows the transmission behavior a strong drop in the emitted sound signals too high Frequencies.
  • the object of the present invention is the transmission behavior an electric-acoustic miniature transducer improve.
  • This task is done with an electrical-acoustic miniature transducer with at least one drive and a membrane solved that the membrane in at least two sound-generating Membrane areas is divided, their transmission behavior is frequency dependent.
  • the presented invention describes an electrical-acoustic Miniature converter that is too high frequencies offers extended transmission range.
  • a natural one Spectrum of acoustic signals transmitted and one improved sound quality can be offered.
  • the miniature electro-acoustic transducers according to the invention instead a relatively large one-piece membrane advantageous one divided into at least two smaller membrane areas Membrane on.
  • To divide the membrane is between two adjacent membrane areas, for example at least one elastic element that is connected to the membrane areas connected is.
  • the total area of the membrane areas and elastic elements can be the membrane surface correspond to conventional miniature transducers.
  • To drive the Membrane is preferably a membrane area with a drive pin connected. The drive takes place at the stand according to the technology via an electromagnetic electrodynamic or piezoelectric drive.
  • High frequencies are essentially only driven by the directly Radiated membrane area. Because of the relatively small sound-generating membrane surface and the associated, small the membrane is the driven mass at high frequencies according to the invention much less inhibited than that Membrane of well-known miniature transducers. At lower frequencies is according to the invention on the elastic element the membrane area adjacent to the driven membrane area so excited that it is also effective for sound generation is. The sound-generating membrane surface therefore corresponds to essential at low frequencies of the membrane surface conventional miniature converter. Thus the subdivision brings about the transducer membrane a dynamic reduction of the moving Masses in the membrane area and thus ensures a reduced Mass inhibition at higher frequencies.
  • the transmission behavior of the miniature transducer according to the invention is therefore the transmission behavior at low and medium frequencies known miniature converter comparable, whereas the transmission range towards high frequencies in the miniature converter is advantageously expanded according to the invention.
  • FIG. 1 is an example of the divided membrane of a miniature transducer shown according to the invention.
  • a membrane area 1 is on a bead 2 with a frame element on Housing 3 of the miniature converter connected.
  • a second, smaller one Membrane area 4 is connected via an elastic element 5 Bead-like consistency in the larger membrane area 1 embedded. It is located directly in the center of the membrane connected to the smaller membrane area 4 drive 6.
  • This can for example be designed as a plunger on the the anchor of an electromagnetic transducer system acts.
  • the bead 2 and the masses of the membrane areas 1 and 4 exists, results in the lower and middle frequency range a uniform movement of the entire membrane surface.
  • the membrane area 1 In the higher frequency range, the membrane area 1 is through dampens its mass, while the membrane area 4 emits radiation maintains.
  • the dynamic reduction that can be achieved in this way the moving masses in the membrane area ensures that Miniature transducers according to the invention for reduced mass inhibition at higher frequencies.
  • the high-frequency transmission properties of the miniature converter are thus opposite known miniature transducers significantly improved.
  • the Membrane arrangement is in a manner known per se in a housing with different volumes and channels built in, which extends the overall transmission characteristic Specify sharing.
  • FIG. 2 The illustration compares the transmission characteristics of a known hearing aid receiver (characteristic curve b, dotted) with a miniature converter of the same type, but which one divided into two sound-generating membrane areas Has membrane according to Figure 1 (characteristic curve a, dashed). Clearly occurs when considering the transmission characteristics in the miniature converter according to the invention (characteristic a) the expansion of the transmission range at higher Frequencies.
  • the miniature converter can, as in FIG. 3 shown, in particular used in a hearing aid 7 be, which in addition to the miniature converter 8 at least one Microphone 9 and a signal processing unit 10 comprises.
  • the invention is not based on the described embodiment limited, but can, without the basic idea of Leaving invention extended to a variety of variants become.
  • a rectangular one Membrane structure is conceivable, in which the membrane areas meet are arranged in a row.
  • Adjacent membrane areas each have a between this lying elastic element.
  • the suggestion of Membrane can also be outside the center, for example on Edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Electrophonic Musical Instruments (AREA)
EP01100376A 2000-01-21 2001-01-05 Transducteur électroacoustique en miniature Expired - Lifetime EP1119219B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10002567 2000-01-21
DE10002567A DE10002567C1 (de) 2000-01-21 2000-01-21 Elektrisch-akustischer Miniaturwandler

Publications (3)

Publication Number Publication Date
EP1119219A2 true EP1119219A2 (fr) 2001-07-25
EP1119219A3 EP1119219A3 (fr) 2005-03-30
EP1119219B1 EP1119219B1 (fr) 2005-12-07

Family

ID=7628313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100376A Expired - Lifetime EP1119219B1 (fr) 2000-01-21 2001-01-05 Transducteur électroacoustique en miniature

Country Status (6)

Country Link
US (1) US20010009587A1 (fr)
EP (1) EP1119219B1 (fr)
AT (1) ATE312496T1 (fr)
DE (2) DE10002567C1 (fr)
DK (1) DK1119219T3 (fr)
ES (1) ES2254264T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008090090A1 (fr) * 2007-01-22 2008-07-31 Siemens Aktiengesellschaft Dispositif de reproduction acoustique et procédé pour la reproduction d'un signal acoustique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0102865D0 (en) * 2001-02-06 2001-03-21 Secr Defence Brit Panel form loudspeaker
DE60221857T2 (de) * 2001-09-10 2008-05-08 Sonion A/S Akustischen Miniwandler
EP3201122B1 (fr) * 2014-10-02 2022-12-28 InvenSense, Inc. Transducteurs ultrasoniques micro-usinés ayant une structure de membrane à fentes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534827A (en) * 1968-06-19 1970-10-20 Stephen L Heidrich Electro-acoustic high impedance transducer
DE2751700A1 (de) * 1977-11-19 1979-05-23 Rainer C Friz Lautsprechermehrwegmembrane mit mechanischer frequenzweiche
EP0022937A1 (fr) * 1979-07-10 1981-01-28 Rainer Cornelius Friz Haut-parleur comportant une membrane à voie multiple

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5960093A (en) * 1998-03-30 1999-09-28 Knowles Electronics, Inc. Miniature transducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534827A (en) * 1968-06-19 1970-10-20 Stephen L Heidrich Electro-acoustic high impedance transducer
DE2751700A1 (de) * 1977-11-19 1979-05-23 Rainer C Friz Lautsprechermehrwegmembrane mit mechanischer frequenzweiche
EP0022937A1 (fr) * 1979-07-10 1981-01-28 Rainer Cornelius Friz Haut-parleur comportant une membrane à voie multiple

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008090090A1 (fr) * 2007-01-22 2008-07-31 Siemens Aktiengesellschaft Dispositif de reproduction acoustique et procédé pour la reproduction d'un signal acoustique

Also Published As

Publication number Publication date
US20010009587A1 (en) 2001-07-26
ATE312496T1 (de) 2005-12-15
DK1119219T3 (da) 2006-04-10
DE10002567C1 (de) 2001-09-27
ES2254264T3 (es) 2006-06-16
EP1119219A3 (fr) 2005-03-30
DE50108266D1 (de) 2006-01-12
EP1119219B1 (fr) 2005-12-07

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