SG81384G - Telephone subscriber's instrument with a tone sounder - Google Patents

Telephone subscriber's instrument with a tone sounder

Info

Publication number
SG81384G
SG81384G SG81384A SG81384A SG81384G SG 81384 G SG81384 G SG 81384G SG 81384 A SG81384 A SG 81384A SG 81384 A SG81384 A SG 81384A SG 81384 G SG81384 G SG 81384G
Authority
SG
Singapore
Prior art keywords
instrument
telephone subscriber
tone sounder
sounder
tone
Prior art date
Application number
SG81384A
Original Assignee
Standard Telephones Cables Ltd
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 Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of SG81384G publication Critical patent/SG81384G/en

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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Telephone Set Structure (AREA)
SG81384A 1980-07-31 1984-11-14 Telephone subscriber's instrument with a tone sounder SG81384G (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8025123A GB2082018B (en) 1980-07-31 1980-07-31 Telephone sounder

Publications (1)

Publication Number Publication Date
SG81384G true SG81384G (en) 1987-07-03

Family

ID=10515183

Family Applications (1)

Application Number Title Priority Date Filing Date
SG81384A SG81384G (en) 1980-07-31 1984-11-14 Telephone subscriber's instrument with a tone sounder

Country Status (3)

Country Link
GB (1) GB2082018B (en)
HK (1) HK55587A (en)
SG (1) SG81384G (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ203265A (en) * 1982-02-26 1985-04-30 Gen Electric Co Plc Electroacoustic transducer with attenuating shutter
GB2168875A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Electroacoustic calling device

Also Published As

Publication number Publication date
GB2082018A (en) 1982-02-24
HK55587A (en) 1987-08-07
GB2082018B (en) 1983-10-12

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