AU588989B2 - An improved transducer - Google Patents

An improved transducer

Info

Publication number
AU588989B2
AU588989B2 AU70931/87A AU7093187A AU588989B2 AU 588989 B2 AU588989 B2 AU 588989B2 AU 70931/87 A AU70931/87 A AU 70931/87A AU 7093187 A AU7093187 A AU 7093187A AU 588989 B2 AU588989 B2 AU 588989B2
Authority
AU
Australia
Prior art keywords
improved transducer
transducer
improved
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.)
Ceased
Application number
AU70931/87A
Other versions
AU7093187A (en
Inventor
Mark Gill
Larry Ross James
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.)
Nokia Services Ltd
Original Assignee
Standard Telephone and Cables Pty Ltd
Standard Telephone and Cables PLC
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 Standard Telephone and Cables Pty Ltd, Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables Pty Ltd
Priority to AU70931/87A priority Critical patent/AU588989B2/en
Publication of AU7093187A publication Critical patent/AU7093187A/en
Application granted granted Critical
Publication of AU588989B2 publication Critical patent/AU588989B2/en
Assigned to ALCATEL AUSTRALIA LIMITED reassignment ALCATEL AUSTRALIA LIMITED Request to Amend Deed and Register Assignors: STANDARD TELEPHONES AND CABLES PTY. LIMITED
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
AU70931/87A 1986-04-10 1987-03-30 An improved transducer Ceased AU588989B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU70931/87A AU588989B2 (en) 1986-04-10 1987-03-30 An improved transducer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPH540386 1986-04-10
AUPH5403 1986-04-10
AU70931/87A AU588989B2 (en) 1986-04-10 1987-03-30 An improved transducer

Publications (2)

Publication Number Publication Date
AU7093187A AU7093187A (en) 1987-10-15
AU588989B2 true AU588989B2 (en) 1989-09-28

Family

ID=25636434

Family Applications (1)

Application Number Title Priority Date Filing Date
AU70931/87A Ceased AU588989B2 (en) 1986-04-10 1987-03-30 An improved transducer

Country Status (1)

Country Link
AU (1) AU588989B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071851A1 (en) * 1981-08-07 1983-02-16 Rosenthal Technik AG Piezoelectric three-tone buzzer
AU1102183A (en) * 1981-12-30 1983-07-15 Motorola, Inc. Piezoelectric transducer apparatus
AU538420B2 (en) * 1979-09-19 1984-08-16 Siemens Aktiengesellschaft Dual resonance piezoilectric transducer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413198A (en) * 1981-12-30 1983-11-01 Motorola, Inc. Piezoelectric transducer apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU538420B2 (en) * 1979-09-19 1984-08-16 Siemens Aktiengesellschaft Dual resonance piezoilectric transducer
EP0071851A1 (en) * 1981-08-07 1983-02-16 Rosenthal Technik AG Piezoelectric three-tone buzzer
AU1102183A (en) * 1981-12-30 1983-07-15 Motorola, Inc. Piezoelectric transducer apparatus

Also Published As

Publication number Publication date
AU7093187A (en) 1987-10-15

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