US3048668A - Transducer suspension system - Google Patents

Transducer suspension system Download PDF

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Publication number
US3048668A
US3048668A US103637A US10363761A US3048668A US 3048668 A US3048668 A US 3048668A US 103637 A US103637 A US 103637A US 10363761 A US10363761 A US 10363761A US 3048668 A US3048668 A US 3048668A
Authority
US
United States
Prior art keywords
transducer
casing
tubular members
damping
sheath
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
Application number
US103637A
Other languages
English (en)
Inventor
Erwin M Weiss
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.)
Beltone Hearing Aid Co
Original Assignee
Beltone Hearing Aid Co
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 Beltone Hearing Aid Co filed Critical Beltone Hearing Aid Co
Priority to US103637A priority Critical patent/US3048668A/en
Priority to DEB66094A priority patent/DE1160504B/de
Priority to GB12393/62A priority patent/GB1005819A/en
Priority to DK157562AA priority patent/DK104140C/da
Priority to CH449662A priority patent/CH397781A/de
Application granted granted Critical
Publication of US3048668A publication Critical patent/US3048668A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G02C11/06—Hearing aids
    • 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
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • 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
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S206/00—Special receptacle or package
    • Y10S206/814—Space filler

Definitions

  • This invention relates generally to a mounting for a transducer and more particularly to a new and improved transducer mounting of the type having advantageous use in electro-acoustical devices, such as hearing aids and the like.
  • transducer mounts of the prior art have not proved entirely satisfactory for a number of reasons.
  • mounts are made of foam or sheet rubber, which have high internal damping characteristics. Accordingly, any change in the rubber mount material, such as stiffening after a period of time, results in an undersirable change in the internal damping characterisics,
  • rubber mounts have been susceptible to the corrosion producing effects of ozone, the brittleness producing effects of light, and the elasticity producing efiects of heat, and it has been common for such prior art mounts to take a permanent set-all of which is in derogation of maintaining a constant, desired internal damping characteristic.
  • FIGURE 1 is an elevational view of a portion of an eyeglasses hearing. aid temple member partly broken away to show a transducer and mount embodying the present invention
  • FIGURE 2 is an exploded view of a transducer and mount assembly in accordance with the invention comprising a microphone and two sheaths formed as halfbooths each having a plurality of hollow tubular members disposed therearound;
  • FIGURE 3 is an end elevational View of a boot or band type of sheath showing the hollow tubular members as attached to the sheath at a tangential point of the tubular members to avoid deformation of the latter when the sheath is elongated;
  • FIGURES 4 and 5 are cross-sectional views of a casing with a transducer mount operatively positioned therein illustrating the isolation action of a boot or band type of mount during two different degrees of movement of said transducer within the casing.
  • FIGURE 1 there is illustrated one particular embodiment of the invention as advantageously utilized in a temple member of hearing aid eyeglasses. While the invention is illustrated in connection with a hearing aid, it will readily be appreciated by those skilled in the art that the novel transducer mounting means may be utilized in many other types of electro-acoustical devices in addition to hearing aids Where mechanical vibratory isolation between the transducer and the case is an important factor.
  • a transducer such as a microphone is positioned in a casing cavity -12 defined by external and internal walls of the hearing aid casing 14.
  • the longitudinal walls 16 and 18 of the casing together with the transverse walls 20 and 22 define a cavity shaped to receive the transducer and suspension assembly.
  • the transducer suspension assembly in accordance with this illustrative embodiment of the present invention comprises a pair.
  • a microphone type of transducer 10 is adapted to be supported in the hearing aid casing cavity by the plurality of elongated open-ended, hollow, tubular members which are spaced around each wall of the boot 24 adapted to be in contact with the walls of the casing cavity 12.
  • the transducer suspension sheath 24 is shaped to fit snugly in closely fitting relationship about the transducer 10 with each wall thereof having one or more hollow, tubular members 26 provided thereon.
  • the hollow, tubular members 25 are illustrated in cylindrical form in the drawing, it will be appreciated by those skilled in the art that the tubular members may have any other suitable configuration, as :for example, oval tubes, triangular tubes and rectangular tubes.
  • the invention is not to be limited to the cylindrical tubes illustrated which is merely one preferred embodiment.
  • the boot 24 and tubular members 26 are formed of a relatively inert, visco-elastic material which may have relatively little internal damping characteristics.
  • the mounts were required to have high internal damping, and the material for such mounts was chosen to provide this particular characteristic.
  • One of the disadvantages of the prior art constructions was the tendency of such mounts to change in stiffness or take a permanent set with the adverse result that the internal damping characteristics of the mount would deteriorate with time.
  • electro-acoustic transducer mounts it is highly desirable for electro-acoustic transducer mounts to have a very low resonant frequency characteristic.
  • the resonant frequency range of such mounts should be well below the amplifier frequency range to avoid any unwanted modulation of audio or extraneous sounds.
  • this characteristic is desirable to enhance the attenuation of the mechanical vibration transmitted to the transducer from the transducer casing.
  • the resonant frequency of the transducer mount cannot be lowered below certain lower frequency limits without raising the possibility of additional problems.
  • the novel hollow tubular members of the mount have the desirable characteristics of low frequency resonance for small deflections, and an increasing resonant frequency for large deflections.
  • the transducer suspension mount will not sustain large amplitude, low frequency vibrations and oscillations tend to die out quickly.
  • the non-linear compliance characteristic of the present invention is such that as the pressure or deflection increases, the mount becomes stiffer.
  • the nonlinear damping characteristic of the invention is such that for any given frequency, the damping increases as the amplitude of vibration increases. Accordingly, such nonlinear damping and non-linear compliance characteristics serve to reduce any tendency of the mount to maintain large amplitude, low frequency vibrations of the type generally due to casing movement, shock, touching, etc.
  • the novel transducer mount comprises a pluraiity of open-ended, hollow, tubular members, as shown in FIGURE 2.
  • These hollow tubular members serve to isolate the transducer from the effects of mechanical vibratory feedback by .the use of a moving air column within the tubes to provide highly desirable non-linear damping and non-linear compliance characteristics.
  • each tubular member provided a highly effective isolation from mechanical vibratory feedback when made with a .040 inch outer diameter, a .030 inch inner diameter and a length of .100 inch.
  • these dimensions are merely illustrative and that the tubular members may be formed with other dimensions in accordance with the invention.
  • FIGURES 3, 4, and 5 illustrate still further advantageous features of the present invention.
  • FIGURE 3 for example, shows the hollow, tubular members 26 on the sheath 34, such as a band or boot, in their normal, uncompressed condition, prior to being inserted in the cavity 12 of the hearing aid case 14.
  • tubular members 26 may be mounted with their outer peripheral surfaces tangent to or even slightly raised above, the outer surface of the inter-connecting sheath 34. This arrangement has the advantage that the tubular members 26 are not materially deformed upon stretching of the sheath 34, as might occur when the sheath is mounted upon a transducer of different size.
  • the transducer 10 normally vibrates in a direction perpendicular to the plane of the transducer diaphragm, as indicated by the arrow 30, shown in FIGURE 4.
  • the hollow tubular members 26 positioned adjacent the side walls of the casing '14 roll with this motion, and therefore, the only coupling between the side walls of the casingand the transducer is the co-eilicient of rolling friction which is extremely low.
  • the hollow tubular members 26 may be positioned on a pair of sheaths, either of bands, or boots such as that illustrated in FIGURE 2, which fit over the opposite ends of the transducer 10.
  • a pair of sheaths either of bands, or boots such as that illustrated in FIGURE 2
  • the transducer 10 may be positioned on a pair of sheaths, either of bands, or boots such as that illustrated in FIGURE 2, which fit over the opposite ends of the transducer 10.
  • transducer suspension system in accordance with claim 4, wherein said hollow, openended, visco-elastic members are shaped to enable said transducer suspension system to roll within the casing in response to casing motion for reducing the coupling between the transducer suspension system and the casing walls.
  • transducer suspension means for use in attenuating mechanical vibratory transmission from a rigid casing to an electro-acoustical transducer comprising a plurality of spaced hollow tubular members disposed around the transducer, said hollow tubular members being formed of relatively inert material to the end that the isolation of the transducer from the casing is provided by the compliance of said hollow tubular members in combination with the damping effects of the moving air column within said tubular members.
  • transducer suspension means for use in attenuating mechanical vibratory transmission from a rigid casing to an electro-acoustical transducer comprising a sheath of relatively inert visco-elastic material positioned around said transducer in closely adhering relationship, and a plurality of spaced hollow tubular members disposed around said sheath, said hollow tubular members being formed of relatively inert visco-elastic material and being mounted in tangential relationship to said sheath such that the isolation of the transducer from the casing is provided by the compliance of said hollow tubular members in combination with the damping effects of the moving air column within said tubular members.
  • tubular means comprises open-ended cylindrical tubes each having its longitudinal axis parallel to the plane of the adjacent wall of the transducer.
  • transducer suspension means for use in attenuating mechanical vibratory transmission from a rigid casing to an electro-acoustic transducer comprising a sheath formed of relatively inert moldable mate rial having low internal damping characteristics and 7 shaped to be positioned in closely fitting relationship around the transducer, and a plurality of hollow, openended, tubular members integrally molded with said sheath and disposed in spaced relationship therearound for enabling the transducer to be isolated from the casing by the compliance of the hollow tubular members in combination with the damping effects of the moving air column Within said tubular members.
  • transducer suspension means in accordance with claim 9 wherein said moldable material comprises non-linear damping and non-linear compliance S characteristics effective to reduce the sustenance of large amplitude, low frequency vibrations arising from casing movement and shock.
  • transducer suspension means in accordance with claim 9 wherein said tubular members are positioned with their outer peripheral surfaces tan gential to the outer surface of said sheath to minimize distortion of said tubular members upon stretching of said sheath.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Vibration Prevention Devices (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
US103637A 1961-04-17 1961-04-17 Transducer suspension system Expired - Lifetime US3048668A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US103637A US3048668A (en) 1961-04-17 1961-04-17 Transducer suspension system
DEB66094A DE1160504B (de) 1961-04-17 1962-02-24 Aufhaengung fuer UEbertragungssysteme elektroakustischer Art
GB12393/62A GB1005819A (en) 1961-04-17 1962-03-30 Transducer suspension system
DK157562AA DK104140C (da) 1961-04-17 1962-04-05 Omsætterfatning.
CH449662A CH397781A (de) 1961-04-17 1962-04-12 Halterung für elektroakustische Übertragungssysteme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US103637A US3048668A (en) 1961-04-17 1961-04-17 Transducer suspension system

Publications (1)

Publication Number Publication Date
US3048668A true US3048668A (en) 1962-08-07

Family

ID=22296223

Family Applications (1)

Application Number Title Priority Date Filing Date
US103637A Expired - Lifetime US3048668A (en) 1961-04-17 1961-04-17 Transducer suspension system

Country Status (5)

Country Link
US (1) US3048668A (de)
CH (1) CH397781A (de)
DE (1) DE1160504B (de)
DK (1) DK104140C (de)
GB (1) GB1005819A (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187115A (en) * 1962-02-21 1965-06-01 Malco Electronics Inc Transducer mounting
US3187833A (en) * 1963-06-17 1965-06-08 Telex Corp Transducer mounting
US3233048A (en) * 1962-06-19 1966-02-01 Telex Corp Hearing aid
US3257516A (en) * 1962-06-25 1966-06-21 Knowles Electronies Inc Combined instrument and transducer motor cavities for acoustic instrument
US3326359A (en) * 1965-08-27 1967-06-20 Seeburg Corp Carrying case for stringed musical instruments
US3749853A (en) * 1972-05-18 1973-07-31 Zenith Radio Corp Hearing aid with directional microphone system
US3786203A (en) * 1972-05-15 1974-01-15 Itt Microphone mounting
US3994399A (en) * 1973-11-01 1976-11-30 Matsushita Electric Industrial Co., Ltd. Packaging means suitable for electrical or similar parts
US4091919A (en) * 1976-09-07 1978-05-30 Monsanto Wafer packaging system
US4129211A (en) * 1976-09-07 1978-12-12 Monsanto Company Wafer packaging system
US4171740A (en) * 1976-09-07 1979-10-23 Monsanto Company Wafer packaging system
US4589547A (en) * 1983-01-14 1986-05-20 Motorola Inc. Carrier for stacked semiconductor die
US4657136A (en) * 1982-04-15 1987-04-14 Ricoh Company, Ltd. Receptacle for memory cassette
US4979620A (en) * 1986-04-25 1990-12-25 Etablissements Pierre Delamare Et Cie Method and apparatus for protecting objects from shocks and vibrations
US5139153A (en) * 1986-04-25 1992-08-18 Establissements Pierre Delamare Et Cie Device for holding objects and protecting them against shocks
US5163551A (en) * 1991-06-28 1992-11-17 Digital Equipment Corporation Integrated circuit device carrier
US20020061113A1 (en) * 2000-11-22 2002-05-23 Van Halteren Aart Zeger Acoustical receiver housing for hearing aids
US20020106096A1 (en) * 1999-06-16 2002-08-08 Andi Vonlanthen Behind-the-ear hearing aid
EP1248496A2 (de) * 2001-04-04 2002-10-09 Microtronic Nederland B.V. Akustischer Empfänger mit verbesserter mechanischer Aufhängung
WO2008116499A1 (en) * 2007-03-27 2008-10-02 Phonak Ag Hearing device with detachable microphone
US20090071861A1 (en) * 2007-05-22 2009-03-19 Zhenyong Wang Foam Buffer Device for Packaging
EP2753102A1 (de) * 2013-01-07 2014-07-09 Oticon A/s Hörgerät mit einer im Ohr tragbaren Komponente
EP3179742A3 (de) * 2015-09-30 2017-08-30 Oticon A/s Hörgerät mit einer empfängeranordnung
US11019435B2 (en) * 2018-08-24 2021-05-25 Sivanots Pte. Ltd. Hearing instrument having a coupling unit for the vibration-damped mounting of a receiver
WO2021126910A1 (en) * 2019-12-16 2021-06-24 Bose Corporation Audio device with vibrationally isolated transducer
US11082784B2 (en) * 2017-07-13 2021-08-03 Sonion Nederland B.V. Hearing device including a vibration preventing arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE897066A (fr) * 1983-06-16 1983-10-17 Staar Sa Dispositif destine a soustraire un appareil de lecture et/ou d'enregistrement a l'influence des sollicitations mecaniques
DE8704315U1 (de) * 1987-03-23 1987-05-27 Siemens AG, 1000 Berlin und 8000 München Hörgerät, dessen Bauelemente in einem Hörgerätgehäuse gehaltert sind
DE102007031872B4 (de) * 2007-07-09 2009-11-19 Siemens Audiologische Technik Gmbh Hörgerät
DE102010030038A1 (de) * 2010-06-14 2011-12-15 Ernst-Moritz-Arndt-Universität Greifswald Vorrichtung zur Aufnahme von Messwerten am Körper eines Patienten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187115A (en) * 1962-02-21 1965-06-01 Malco Electronics Inc Transducer mounting
US3233048A (en) * 1962-06-19 1966-02-01 Telex Corp Hearing aid
US3257516A (en) * 1962-06-25 1966-06-21 Knowles Electronies Inc Combined instrument and transducer motor cavities for acoustic instrument
US3187833A (en) * 1963-06-17 1965-06-08 Telex Corp Transducer mounting
US3326359A (en) * 1965-08-27 1967-06-20 Seeburg Corp Carrying case for stringed musical instruments
US3786203A (en) * 1972-05-15 1974-01-15 Itt Microphone mounting
US3749853A (en) * 1972-05-18 1973-07-31 Zenith Radio Corp Hearing aid with directional microphone system
US3994399A (en) * 1973-11-01 1976-11-30 Matsushita Electric Industrial Co., Ltd. Packaging means suitable for electrical or similar parts
US4171740A (en) * 1976-09-07 1979-10-23 Monsanto Company Wafer packaging system
US4129211A (en) * 1976-09-07 1978-12-12 Monsanto Company Wafer packaging system
US4091919A (en) * 1976-09-07 1978-05-30 Monsanto Wafer packaging system
US4657136A (en) * 1982-04-15 1987-04-14 Ricoh Company, Ltd. Receptacle for memory cassette
US4589547A (en) * 1983-01-14 1986-05-20 Motorola Inc. Carrier for stacked semiconductor die
US4979620A (en) * 1986-04-25 1990-12-25 Etablissements Pierre Delamare Et Cie Method and apparatus for protecting objects from shocks and vibrations
US5139153A (en) * 1986-04-25 1992-08-18 Establissements Pierre Delamare Et Cie Device for holding objects and protecting them against shocks
US5163551A (en) * 1991-06-28 1992-11-17 Digital Equipment Corporation Integrated circuit device carrier
US20020106096A1 (en) * 1999-06-16 2002-08-08 Andi Vonlanthen Behind-the-ear hearing aid
US7099484B2 (en) * 1999-06-16 2006-08-29 Phonak Ag Behind-the-ear hearing aid
US20020061113A1 (en) * 2000-11-22 2002-05-23 Van Halteren Aart Zeger Acoustical receiver housing for hearing aids
US7657048B2 (en) 2000-11-22 2010-02-02 Sonion Nederland B.V. Acoustical receiver housing for hearing aids
US20070127744A1 (en) * 2000-11-22 2007-06-07 Van Halteren Aart Z Acoustical receiver housing for hearing aids
US7181035B2 (en) 2000-11-22 2007-02-20 Sonion Nederland B.V. Acoustical receiver housing for hearing aids
US7088839B2 (en) 2001-04-04 2006-08-08 Sonion Nederland B.V. Acoustic receiver having improved mechanical suspension
US20060239488A1 (en) * 2001-04-04 2006-10-26 Sonion Nederland B.V. Acoustic receiver having improved mechanical suspension
US7206428B2 (en) 2001-04-04 2007-04-17 Sonion Nederland B.V. Acoustic receiver having improved mechanical suspension
EP1248496A3 (de) * 2001-04-04 2005-11-02 Sonionmicrotronic Nederland B.V. Akustischer Empfänger mit verbesserter mechanischer Aufhängung
EP1248496A2 (de) * 2001-04-04 2002-10-09 Microtronic Nederland B.V. Akustischer Empfänger mit verbesserter mechanischer Aufhängung
WO2008116499A1 (en) * 2007-03-27 2008-10-02 Phonak Ag Hearing device with detachable microphone
US20100128915A1 (en) * 2007-03-27 2010-05-27 Phonak Ag Hearing device with detachable microphone
US8229150B2 (en) 2007-03-27 2012-07-24 Phonak Ag Hearing device with detachable microphone
US20090071861A1 (en) * 2007-05-22 2009-03-19 Zhenyong Wang Foam Buffer Device for Packaging
EP2753102A1 (de) * 2013-01-07 2014-07-09 Oticon A/s Hörgerät mit einer im Ohr tragbaren Komponente
EP3179742A3 (de) * 2015-09-30 2017-08-30 Oticon A/s Hörgerät mit einer empfängeranordnung
US10051383B2 (en) 2015-09-30 2018-08-14 Oticon A/S Hearing aid comprising a receiver assembly
US10499166B2 (en) 2015-09-30 2019-12-03 Oticon A/S Hearing aid comprising a receiver assembly
EP3624466A1 (de) * 2015-09-30 2020-03-18 Oticon A/s Hörgerät mit einer empfängeranordnung
US11082784B2 (en) * 2017-07-13 2021-08-03 Sonion Nederland B.V. Hearing device including a vibration preventing arrangement
US11019435B2 (en) * 2018-08-24 2021-05-25 Sivanots Pte. Ltd. Hearing instrument having a coupling unit for the vibration-damped mounting of a receiver
WO2021126910A1 (en) * 2019-12-16 2021-06-24 Bose Corporation Audio device with vibrationally isolated transducer
US11223889B2 (en) 2019-12-16 2022-01-11 Bose Corporation Audio device with vibrationally isolated transducer

Also Published As

Publication number Publication date
CH397781A (de) 1965-08-31
GB1005819A (en) 1965-09-29
DE1160504B (de) 1964-01-02
DK104140C (da) 1966-04-12

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