CN101494806A

CN101494806A - Mechanical passive quakeproof earphone

Info

Publication number: CN101494806A
Application number: CNA2008100467352A
Authority: CN
Inventors: 彭琦
Original assignee: Hubei Normal University
Current assignee: Hubei Normal University
Priority date: 2008-01-21
Filing date: 2008-01-21
Publication date: 2009-07-29

Abstract

A mechanical type passive shockproof earphone comprises a amplitude limit sound transmission member and a earmuff; the amplitude limiting sound transmission member is made up of two amplitude limiting baffle plates, a acoustic diaphragm installed between the two baffle plates and ring shaped amplitude limiting gaskets disposed between the acoustic diaphragm and the amplitude limiting baffle plate, by multilayer fixing; the earmuff is installed on the amplitude limiting baffle plate on one side; and dense sound transmission holes are formed on the baffle plates; The invention adopts mechanical type amplitude limiting sound transmission, achieves the advantages of no power supply, simple structure, small volume, convenient wearing and maintaining, and high reliability; not only can transmit normal sound in high sensitivity and high quality, but also can limit the amplitude of sudden high db noise; is very suitable for battle environment.

Description

Mechanical passive quakeproof earphone

(1) technical field:

The invention belongs to a kind of quakeproof earphone, specifically is to be suitable for the mechanical passive quakeproof earphone that the staff under the sudden high-decibel noise circumstance of battlefield surroundings pulsed uses.

(2) background technology:

In battlefield surroundings, shell emission and blast belong to the paroxysmal high-decibel noise of pulsed, and these noises have traumatic serious harm to the ear-drum of staying staff wherein; And, should protect of the infringement of high-decibel noise to ear-drum for the staff under this environment, must keep high-sensitive hearing ability again; Therefore, they use the protective earphone must the sound of normal quantity directly be conducted, and can carry out amplitude limit to the noise that exceeds normal quantity again.Present existing quakeproof earphone all is to adopt the active formula of electronics, and its basic principle is to remove noise signal outside the speech frequency by filter, and the sound of high-decibel is carried out the voltage amplitude limit; Though it is good that this earphone has shockproof effect, amplitude limit intensity is reliable and be easy to advantage such as adjustments, because complex structure, volume is big, needs battery that power supply is provided, and wears and safeguards loaded down with trivial detailsly, is not suitable for use under the battlefield surroundings.

(3) summary of the invention:

Purpose of the present invention just provides a kind of simple in structure, and volume is little, and the fully mechanical structure need not power supply, wears easy to maintenancely, is fit to the mechanical passive quakeproof earphone that battlefield surroundings uses down.

Technical scheme of the present invention comprises transaudient member of amplitude limit and earmuff, it is characterized in that: the transaudient member of described amplitude limit is by two amplitude limit baffle plates, be contained in the transaudient film between the baffle plate and be arranged on transaudient film and the amplitude limit baffle plate between stacked affixed the forming of annular amplitude limit pad, earmuff is contained on the amplitude limit baffle plate of a side, has intensive sound transmission aperture on the described baffle plate.

Operation principle of the present invention is: when the sound of surrounding environment less than ear-drum safety acoustic pressure the time, the deformation distance of transaudient film is less than the thickness of amplitude limit pad, sound by sound transmission aperture by normal conduction.When the sound of surrounding environment the time greater than ear-drum safety acoustic pressure; the deformation distance of transaudient film is greater than the thickness of amplitude limit pad; its distortion baffle plate that is limited stops; the amplitude of transaudient film conduction sound is limited; thereby realize the high-decibel noise is carried out the amplitude limit of safe range, reach the protection of staff's ear-drum under the sudden high-decibel noise circumstance of paired pulses formula.

The present invention is owing to adopt the mechanical type amplitude limit transaudient, need not power supply, simple in structure, volume is little, good reliability is worn easy to maintenancely, can make highly sensitive, the high-quality conduction of normal sound, again can be reliably paroxysmal high-decibel noise be carried out amplitude limit in the safe range, very suitable battlefield surroundings uses down.

(4) description of drawings:

Fig. 1 is that the side of the embodiment of the invention is cutd open structural representation;

Fig. 2 is the Facad structure schematic diagram of amplitude limit baffle plate among Fig. 1;

Fig. 3 is the Facad structure schematic diagram of amplitude limit pad among Fig. 1;

Fig. 4 is the deformation state structural representation of ambient sound transaudient film during less than ear-drum safety acoustic pressure;

Fig. 5 is the deformation state structural representation of ambient sound transaudient film during greater than ear-drum safety acoustic pressure.

(5) embodiment:

Referring to Fig. 1, Fig. 2, Fig. 3, be by two amplitude limit baffle plates 1 in the present embodiment, be contained in the transaudient film 2 between the amplitude limit baffle plate and be arranged on transaudient film and limit film baffle plate between annular amplitude limit pad 3 stacked affixed forming; The amplitude limit baffle plate is made by the hard material with certain intensity and thickness, when the setting, transaudient film is subjected to stopping of amplitude limit baffle plate, can only produce the vibration deformation of predetermined distance when loud, thereby reach the purpose of amplitude limit, have intensive sound transmission aperture 4 on the amplitude limit baffle plate; Transaudient film is to be made by thin light material, and the volume for the normal impression of needs can realize the conduction of loss minimum.The amplitude limit pad has certain thickness, transaudient film and amplitude limit baffle plate can be separated certain distance, thereby limit the amplitude of normal conduction volume according to actual needs; Earmuff 5 is placed on the amplitude limit baffle plate of a side, is used for the transaudient approach beyond the transaudient film is carried out flexible isolating.When manufacturing, generally use screw or glue that baffle plate, pad and film are fixed together.Fig. 4, Fig. 5 be expression when ambient sound less than or during greater than the ear-drum secure voice, the deformation state of transaudient film illustrates use principle of the present invention with this.

Claims

1. mechanical passive quakeproof earphone, comprise transaudient member of amplitude limit and earmuff, it is characterized in that: the transaudient member of described amplitude limit is by two amplitude limit baffle plates, be contained in the transaudient film between the baffle plate and be arranged on transaudient film and the amplitude limit baffle plate between stacked affixed the forming of annular amplitude limit pad, earmuff is contained on the amplitude limit baffle plate of a side, has intensive sound transmission aperture on the described baffle plate.