SE410695B - Horselskydd med hortelefoner - Google Patents

Horselskydd med hortelefoner

Info

Publication number
SE410695B
SE410695B SE7614482A SE7614482A SE410695B SE 410695 B SE410695 B SE 410695B SE 7614482 A SE7614482 A SE 7614482A SE 7614482 A SE7614482 A SE 7614482A SE 410695 B SE410695 B SE 410695B
Authority
SE
Sweden
Prior art keywords
horteephones
horse protection
horse
protection
Prior art date
Application number
SE7614482A
Other languages
English (en)
Other versions
SE7614482L (sv
Inventor
L A T Persson
T R Lundin
Original Assignee
Gullfiber Ab
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 Gullfiber Ab filed Critical Gullfiber Ab
Priority to SE7614482A priority Critical patent/SE410695B/sv
Priority to GB49538/77A priority patent/GB1593997A/en
Priority to FI773663A priority patent/FI773663A/fi
Priority to CA292,525A priority patent/CA1085742A/en
Priority to FR7737090A priority patent/FR2375785A1/fr
Priority to AT0900477A priority patent/AT374315B/de
Priority to DE2756159A priority patent/DE2756159B2/de
Priority to NL7714131A priority patent/NL7714131A/xx
Priority to DK572177A priority patent/DK572177A/da
Publication of SE7614482L publication Critical patent/SE7614482L/sv
Priority to US06/015,359 priority patent/US4224470A/en
Publication of SE410695B publication Critical patent/SE410695B/sv

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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • 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
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
SE7614482A 1976-12-22 1976-12-22 Horselskydd med hortelefoner SE410695B (sv)

Priority Applications (10)

Application Number Priority Date Filing Date Title
SE7614482A SE410695B (sv) 1976-12-22 1976-12-22 Horselskydd med hortelefoner
GB49538/77A GB1593997A (en) 1976-12-22 1977-11-29 Ear-pads allowing communication with the wearer
FI773663A FI773663A (fi) 1976-12-22 1977-12-02 Hoerselskydd med kommunikationsmoejlighet
CA292,525A CA1085742A (en) 1976-12-22 1977-12-06 Ear pads with earphones
FR7737090A FR2375785A1 (fr) 1976-12-22 1977-12-08 Casque a ecouteurs permettant de communiquer avec l'utilisateur
AT0900477A AT374315B (de) 1976-12-22 1977-12-15 Gehoerschutz-schaltung mit in zwei gehoerschutzmuscheln eingesetzten elektromagnetischen hoerkapseln
DE2756159A DE2756159B2 (de) 1976-12-22 1977-12-16 Gehörschutz mit in die Gehörschutzmuscheln integrierten elektromagnetischen Hörkapseln
NL7714131A NL7714131A (nl) 1976-12-22 1977-12-20 Gehoorbeschermer met mogelijkheid tot berichtoverdracht.
DK572177A DK572177A (da) 1976-12-22 1977-12-21 Hoerelsesbeskytter med kommunikationsmulighed
US06/015,359 US4224470A (en) 1976-12-22 1979-02-26 Headset with limiter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7614482A SE410695B (sv) 1976-12-22 1976-12-22 Horselskydd med hortelefoner

Publications (2)

Publication Number Publication Date
SE7614482L SE7614482L (sv) 1978-06-23
SE410695B true SE410695B (sv) 1979-10-22

Family

ID=20329827

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7614482A SE410695B (sv) 1976-12-22 1976-12-22 Horselskydd med hortelefoner

Country Status (10)

Country Link
US (1) US4224470A (sv)
AT (1) AT374315B (sv)
CA (1) CA1085742A (sv)
DE (1) DE2756159B2 (sv)
DK (1) DK572177A (sv)
FI (1) FI773663A (sv)
FR (1) FR2375785A1 (sv)
GB (1) GB1593997A (sv)
NL (1) NL7714131A (sv)
SE (1) SE410695B (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8223994B2 (en) 2006-07-12 2012-07-17 3M Svenska Aktiebolag Method of limiting the maximum permitted sound volume in an earphone, and an earphone for carrying out the method

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120903B (en) * 1982-05-28 1986-02-26 British Broadcasting Corp Headphone level protection circuit
GB2152785B (en) * 1982-05-28 1986-02-26 British Broadcasting Corp Headphone level protection circuit
US4479239A (en) * 1983-03-28 1984-10-23 Silver Creek Nurseries, Inc. Sound detecting device
DE3312801A1 (de) * 1983-04-09 1984-10-11 Diehl GmbH & Co, 8500 Nürnberg Verfahren zur steigerung der konzentrationsfaehigkeit und vorrichtung zum ausueben des verfahrens
US4538296A (en) * 1983-07-22 1985-08-27 Short Robert S Sound inhibitor for audio transducers
FR2551591B1 (fr) * 1983-08-31 1985-10-25 Radiotechnique Dispositif pour le reglage d'un signal delivre sur une prise pour fiche cylindrique, et appareil equipe d'un tel dispositif
US4677678A (en) * 1984-07-10 1987-06-30 The United States Of America As Represented By The Department Of Health And Human Services Active hearing protectors
US4928311A (en) * 1986-01-03 1990-05-22 Trompler Lyle D Noise limiting circuit for earmuffs
US4809336A (en) * 1987-03-23 1989-02-28 Pritchard Eric K Semiconductor amplifier with tube amplifier characteristics
US4944015A (en) * 1988-04-29 1990-07-24 Juve Ronald A Audio compression circuit for television audio signals
US5371803A (en) * 1990-08-31 1994-12-06 Bellsouth Corporation Tone reduction circuit for headsets
US5369711A (en) * 1990-08-31 1994-11-29 Bellsouth Corporation Automatic gain control for a headset
GB2279202B (en) * 1993-06-09 1997-05-21 Michael John Fogarty Electronic conversion for passive ear muffs
US5701352A (en) * 1994-07-14 1997-12-23 Bellsouth Corporation Tone suppression automatic gain control for a headset
US7583797B2 (en) * 2000-07-10 2009-09-01 Broadcom Corporation Single ended analog front end
US20030103633A1 (en) * 2001-11-01 2003-06-05 Metcalfe Thomas O. Kids ear saver headphone adapter
WO2003079722A1 (en) 2002-03-20 2003-09-25 Sennheiser Communications A/S Active audio compressing in telecommunication
WO2007112424A2 (en) * 2006-03-28 2007-10-04 Ingemi Corp. Audio limiting device for headphones
SE532191C2 (sv) * 2007-05-07 2009-11-10 3M Svenska Ab Förfarande och anordning för dämpning av en ljudsignal
US8130980B2 (en) * 2007-06-21 2012-03-06 Creative Technology Ltd Automatic gain control circuit for volume control and corresponding method for volume control
US20100215198A1 (en) * 2009-02-23 2010-08-26 Ngia Lester S H Headset assembly with ambient sound control
GB2469269A (en) 2009-04-03 2010-10-13 Limitear Ltd A light emitting diode used as a limiter and high volume indicator for an audio transducer
US20120250881A1 (en) * 2011-03-29 2012-10-04 Mulligan Daniel P Microphone biasing
US9167340B2 (en) 2012-10-15 2015-10-20 Direct Sound Headphones, LLC Apparatus and methods for limiting sound volume
CN107295436B (zh) * 2017-07-31 2019-06-11 乐利精密工业(深圳)有限公司 具有滑动机构的头戴式耳机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306991A (en) * 1963-06-04 1967-02-28 Homer J Wood Protective hearing aid
US3959602A (en) * 1974-11-19 1976-05-25 Bell Telephone Laboratories, Incorporated Telephone substation circuit
NL174420C (nl) * 1975-06-30 1984-06-01 Philips Nv Beveiligingsinrichting voor een telefoontoestel.
JPS525204A (en) * 1975-07-01 1977-01-14 Seiko Epson Corp Hearing aid
US3991272A (en) * 1975-09-08 1976-11-09 Tarr Lloyd A Audio AGC amplifier
US4064362A (en) * 1976-09-13 1977-12-20 David Richard Williams Hearing protector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8223994B2 (en) 2006-07-12 2012-07-17 3M Svenska Aktiebolag Method of limiting the maximum permitted sound volume in an earphone, and an earphone for carrying out the method

Also Published As

Publication number Publication date
US4224470A (en) 1980-09-23
ATA900477A (de) 1983-08-15
NL7714131A (nl) 1978-06-26
FI773663A (fi) 1978-06-23
SE7614482L (sv) 1978-06-23
FR2375785A1 (fr) 1978-07-21
GB1593997A (en) 1981-07-22
DK572177A (da) 1978-06-23
DE2756159A1 (de) 1978-07-06
DE2756159B2 (de) 1980-02-14
CA1085742A (en) 1980-09-16
AT374315B (de) 1984-04-10

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