GB1330968A - Earphones - Google Patents

Earphones

Info

Publication number
GB1330968A
GB1330968A GB5985971A GB1330968DA GB1330968A GB 1330968 A GB1330968 A GB 1330968A GB 5985971 A GB5985971 A GB 5985971A GB 1330968D A GB1330968D A GB 1330968DA GB 1330968 A GB1330968 A GB 1330968A
Authority
GB
United Kingdom
Prior art keywords
earphone
ring
filter circuit
earphones
transducer
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
Application number
GB5985971A
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.)
Gendin G S
Original Assignee
Gendin G S
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 Gendin G S filed Critical Gendin G S
Publication of GB1330968A publication Critical patent/GB1330968A/en
Expired 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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Networks Using Active Elements (AREA)

Abstract

1330968 Earphones; Filter circuits G S GENDIN 23 Dec 1971 59859/71 Heading H4J An earphone or each earphone of a pair is provided with a passive filter circuit which compensates for irregularity of the frequency characteristic of the transducer in the earphone. As described the filter circuit (Fig. 2) comprises two resistors 9, 10 and two capacitors 11, 12. The overall effect is to increase the response at high and low frequencies relative to the response at 1000 Hz. The filter circuit is on a printed circuit board on the magnet pot 13 (Fig. 1) of the transducer 3. This is of dynamic type having a cone 4 and it is in a plastics case 1 having a plastics ring 2 of internal diameter equal to the diameter of the radiating part of the cone 4. A rubber seal 5, again of the same diameter, is adhered to the ring 2. The ring 2 and seal 5 define a cavity 6 for enhancement of the sound. In a headset, e.g. for stereo, two such earphones are provided on a headband (not shown) having a three-stop adjustment range.
GB5985971A 1971-12-23 1971-12-23 Earphones Expired GB1330968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00211545A US3849602A (en) 1971-12-23 1971-12-23 Earphone with frequency correction

Publications (1)

Publication Number Publication Date
GB1330968A true GB1330968A (en) 1973-09-19

Family

ID=22787378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5985971A Expired GB1330968A (en) 1971-12-23 1971-12-23 Earphones

Country Status (3)

Country Link
US (1) US3849602A (en)
FR (1) FR2168143B1 (en)
GB (1) GB1330968A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988541A (en) * 1975-01-14 1976-10-26 Iowa State University Research Foundation, Inc. Method and apparatus for frequency compensation of electro-mechanical transducer
US4689818A (en) * 1983-04-28 1987-08-25 Siemens Hearing Instruments, Inc. Resonant peak control
FR2570239B1 (en) * 1984-09-07 1988-07-15 Centre Nat Rech Scient EARPHONE, TELEPHONE HANDSET AND HEADSET FOR CORRECTING INDIVIDUAL HEARING DEFICIENCIES
US5123052A (en) * 1990-02-01 1992-06-16 Brisson Bruce A Method and apparatus for reducing the attenuation and phase shift of low frequency components of audio signals
US6771781B2 (en) 2001-05-08 2004-08-03 Daniel A. Chattin Variable damping circuit for a loudspeaker
WO2008109826A1 (en) * 2007-03-07 2008-09-12 Personics Holdings Inc. Acoustic dampening compensation system
CN201577178U (en) * 2009-12-10 2010-09-08 陈小丽 Earphone with passive sound effect adjusting function

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR823417A (en) * 1936-09-30 1938-01-20 Loudspeaker enhancements
FR1067128A (en) * 1952-11-26 1954-06-11 Amplifier for the deaf
US3038964A (en) * 1956-08-06 1962-06-12 Amar G Bose Loudspeaker system

Also Published As

Publication number Publication date
FR2168143A1 (en) 1973-08-31
FR2168143B1 (en) 1976-07-23
US3849602A (en) 1974-11-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees