MY106119A - Noise reducing device - Google Patents

Noise reducing device

Info

Publication number
MY106119A
MY106119A MYPI90000462A MYPI19900462A MY106119A MY 106119 A MY106119 A MY 106119A MY PI90000462 A MYPI90000462 A MY PI90000462A MY PI19900462 A MYPI19900462 A MY PI19900462A MY 106119 A MY106119 A MY 106119A
Authority
MY
Malaysia
Prior art keywords
acoustic
external noise
signal
electro
wearer
Prior art date
Application number
MYPI90000462A
Inventor
Kimura Akira
Sasaki Tooru
Kobayashi Nobuo
Original Assignee
Sony Corp
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
Priority claimed from JP1075277A external-priority patent/JPH02252399A/en
Priority claimed from JP1075276A external-priority patent/JPH02252398A/en
Application filed by Sony Corp filed Critical Sony Corp
Publication of MY106119A publication Critical patent/MY106119A/en

Links

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)

Abstract

THIS INVENTION IS CONCERNED WITH A DEVICE FOR REDUCING THE EXTERNAL NOISE REACHING THE EAR IN EXTREMELY NOISY PLACES SUCH AS IN THE VEHICLE OR CONSTRUCTION SITES. ACCORDING TO THE PRESENT INVENTION, THE EXTERNAL NOISE IS PICKED UP BY A MICROPHONE PROVIDED IN THE VICINITY OF AN ELECTRO-ACOUSTIC TRANSDUCER ELEMENT, SUCH AS A HEADPHONE UNIT, PROVIDED IN THE VICINITY OF THE WEARER''S EAR, AND THE NOISE SIGNAL CONVERTED IN THIS MANNER INTO ELECTRICAL SIGNALS IS PRODUCED AS THE ACOUSTIC SIGNAL BY THE ELECTRO ACOUSTIC TRANSDUCER AS THE ACOUSTIC SIGNAL BY THE ELECTRO ACOUSTIC TRANSDUCER ELEMENT. THE TRANSFER CHARACTERISTICS ARE CONTROLLED IN SUCH A MANNER THAT THE PRODUCED NOISE SIGNAL PROVE TO BE AN ACOUSTIC SIGNAL WHICH IS OF THE SAME FREQUENCY SPECTRUM AND OPPOSITE IN PHASE WITH RESPECT TO THE EXTERNAL NOISE REACHING THE WEARER''S ACOUSTIC MEATUS FROM OUTSIDE TO REDUCE THE EXTERNAL NOISE REACHING THE ACOUSTIC MEATUS.(FIG. 1)
MYPI90000462A 1989-03-25 1990-03-23 Noise reducing device MY106119A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1075277A JPH02252399A (en) 1989-03-25 1989-03-25 Audible signal listening device
JP1075276A JPH02252398A (en) 1989-03-25 1989-03-25 Noise reducing device

Publications (1)

Publication Number Publication Date
MY106119A true MY106119A (en) 1995-03-31

Family

ID=80252969

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI90000462A MY106119A (en) 1989-03-25 1990-03-23 Noise reducing device

Country Status (1)

Country Link
MY (1) MY106119A (en)

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