CN103024624B - With the earphone of embedded pressure-equalizing device - Google Patents

Abstract

The invention discloses a kind of earphone with embedded pressure-equalizing device, comprise earphone procapsid and earphone back casing, ear muff is provided with outside described earphone procapsid, described earphone procapsid is provided with front acoustic aperture, described ear muff and described earphone procapsid surround the front operatic tunes, described earphone procapsid and described earphone back casing surround the rear operatic tunes, be provided with in the rear operatic tunes that described earphone procapsid and described earphone back casing surround and all press cavity, on described medial surface of all pressing the end face of cavity to be fitted in described earphone procapsid, described all surrounding between pressure cavity and the medial surface of described earphone procapsid all presses chamber, described earphone procapsid is provided with and described first air-vent of all pressing chamber through, described all pressure on the bottom surface of cavity is provided with second air-vent through with the described rear operatic tunes away from the position of described first air-vent.The earphone of the embedded pressure-equalizing device of band of the present invention, can balance air pressure and the acoustic pressure of the front operatic tunes of earphone and the rear operatic tunes, make earphone comfortable wearing, tonequality is good.

Description

With the earphone of embedded pressure-equalizing device

Technical field

The present invention relates to ear phone technology field, specifically, relate to a kind of earphone with embedded pressure-equalizing device.

Background technology

Existing earphone comprises earphone procapsid and earphone back casing, and earphone procapsid is provided with ear muff, and earphone back casing is closed or semi-enclosed, and ear muff sometimes adopts air-locked cortex ear muff.The earphone of this structure, ear muff and earphone procapsid combine in the formed front operatic tunes, and earphone procapsid and earphone back casing combine in the formed rear operatic tunes and easily will produce pressure, cause sound wave normally naturally to transmit.Such as occur the situation that earphone tonequality is stuffy, constrain, when the gas shock Loudspeaker diaphragm in the current operatic tunes and people's ear-drum, vibrating diaphragm is out of shape by air blast impacts, thus occurs dystimbria.The comfortableness causing earphone to be worn reduces and earphone distortion increases.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of earphone that can balance the front operatic tunes of earphone and the air pressure of the rear operatic tunes and the embedded pressure-equalizing device of the band of acoustic pressure.

For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of earphone with embedded pressure-equalizing device, comprise earphone procapsid and earphone back casing, ear muff is provided with outside described earphone procapsid, described earphone procapsid is provided with front acoustic aperture, described ear muff and described earphone procapsid surround the front operatic tunes, described earphone procapsid and described earphone back casing surround the rear operatic tunes, be provided with in the rear operatic tunes that described earphone procapsid and described earphone back casing surround and all press cavity, on described medial surface of all pressing the end face of cavity to be fitted in described earphone procapsid, described all surrounding between pressure cavity and the medial surface of described earphone procapsid all presses chamber, described earphone procapsid is provided with and described first air-vent of all pressing chamber through, described all pressure on the bottom surface of cavity is provided with second air-vent through with the described rear operatic tunes away from the position of described first air-vent.

Preferably, described all pressure in cavity is provided with acoustic resistance unit.

Preferably, described acoustic resistance unit is the acoustic resistance unit adopting sound-resistance material to realize acoustic resistance.

Preferably, described acoustic resistance unit is the acoustic resistance unit adopting non-sound-resistance material to realize acoustic resistance.

After have employed technique scheme, the invention has the beneficial effects as follows: the earphone due to the embedded pressure-equalizing device of this band comprises earphone procapsid and earphone back casing, ear muff is provided with outside described earphone procapsid, described earphone procapsid is provided with front acoustic aperture, described ear muff and described earphone procapsid surround the front operatic tunes, described earphone procapsid and described earphone back casing surround the rear operatic tunes, be provided with in the rear operatic tunes that described earphone procapsid and described earphone back casing surround and all press cavity, on described medial surface of all pressing the end face of cavity to be fitted in described earphone procapsid, described all surrounding between pressure cavity and the medial surface of described earphone procapsid all presses chamber, described earphone procapsid is provided with and described first air-vent of all pressing chamber through, described all pressure on the bottom surface of cavity is provided with second air-vent through with the described rear operatic tunes away from the position of described first air-vent.Add the earphone of the pressure-equalizing device of this structure when wearing, the air-flow that pressing ear muff produces is entered by the first air-vent on earphone procapsid all presses cavity, then air-flow again through all press the second air-vent on cavity enter earphone back casing and earphone procapsid be combined together to form after the operatic tunes, realize operatic tunes air-flow before and after earphone to communicate, balance air pressure and the acoustic pressure of the front operatic tunes and the rear operatic tunes, make earphone comfortable wearing, tonequality is good.

Described all pressure in cavity is provided with acoustic resistance unit, increases acoustic resistance, acoustic resistance unit can air pressure by time stop the leakage of sound, while ensureing earphone bass frequencies, electroacoustic transducer can be vibrated naturally smoothly, thus obtains the tonequality of high reduction degree.By changing the density of acoustic resistance unit, changing the damping value of acoustic resistance unit, reaching the object regulating headphones sound frequency response.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described:

Fig. 1 is the structural representation of the earphone of the embedded pressure-equalizing device of band of the present invention;

Fig. 2 is the earphone equivalent circuit diagram of the embedded pressure-equalizing device of band of the present invention;

In figure: 1, ear muff; 2, earphone procapsid; 3, front acoustic aperture; 4, earphone back casing; 5, the first air-vent; 6, the second air-vent; 7, acoustic resistance unit; 8, all cavity is pressed.

Embodiment

Fig. 1 is the structural representation of the earphone of the embedded pressure-equalizing device of band of the present invention, Fig. 2 is the equivalent circuit diagram of the earphone of the embedded pressure-equalizing device of band of the present invention, see figures.1.and.2, the earphone of the embedded pressure-equalizing device of band of the present invention, comprise earphone procapsid 2 and earphone back casing 4, ear muff 1 is provided with outside earphone procapsid 2, earphone procapsid 2 is provided with front acoustic aperture 3, ear muff 1 and earphone procapsid 2 surround the front operatic tunes, earphone procapsid 2 and earphone back casing 4 surround the rear operatic tunes, be provided with in the rear operatic tunes that earphone procapsid 2 and earphone back casing 4 surround and all press cavity 8, the end face of cavity 8 is all pressed to be fitted on the medial surface of earphone procapsid 2, all surround between pressure cavity 8 and the medial surface of earphone procapsid 2 and all press chamber, earphone procapsid 2 is provided with and first air-vent 5 of all pressing chamber through, the position away from the first air-vent 5 on the bottom surface of cavity 8 is all pressed to be provided with second air-vent 6 through with the rear operatic tunes.Add the earphone of the pressure-equalizing device of this structure when wearing, the air-flow that pressing ear muff 1 produces is entered by the first air-vent 5 on earphone procapsid 2 and all presses cavity 8, then air-flow again through all press the second air-vent 6 on cavity 8 enter earphone back casing 4 and earphone procapsid 2 be combined together to form after the operatic tunes, realize operatic tunes air-flow before and after earphone to communicate, balance air pressure and the acoustic pressure of the front operatic tunes and the rear operatic tunes, make earphone comfortable wearing, tonequality is good.

All press in cavity 8 and be provided with acoustic resistance unit 7, acoustic resistance unit 7 be the acoustic resistance unit adopting sound-resistance material to realize, and namely sound-resistance material absorbs sound damping material, such as, adopt sponge, compression cotton or active carbon adsorption material etc. to absorb sound damping material; Certainly, the acoustic resistance unit 7 of the equivalence that non-sound-resistance material also can be adopted to make, such as, adopt the non-sound-resistance material such as metal or plastics, non-acoustic damping material made staggered dentation or staggered poroid, realize acoustic resistance effect.Acoustic resistance unit 7 increases acoustic resistance, can air pressure by time stop the leakage of sound, while ensureing earphone bass frequencies, electroacoustic transducer can be vibrated naturally smoothly, thus obtains the tonequality of high reduction degree.

With reference to Fig. 2, R5 represents the acoustic resistance value of the first air-vent, R6 represents the acoustic resistance value of the second air-vent, R7 represents the acoustic resistance value of all pressing the acoustic resistance unit 7 in cavity, and in equivalent electric circuit, R5, R6 and R7 connect, therefore, all press after adding acoustic resistance unit 7 in cavity, the acoustic resistance value of pressure-equalizing device entirety will become large, effectively prevents the leakage of sound.The equivalent formulation of acoustic resistance value R and acoustic mass L is:

$R=\frac{l}{{\mathrm{\π\α}}^3}\sqrt{2\mathrm{\η\ω}{\mathrm{\ρ}}_o}$

$L=\frac{{\mathrm{\ρ}}_{o}l}{{\mathrm{\π\α}}^2}\mathrm{\ω}$

Wherein, ι is acoustic aperture length, and ρ is atmospheric density, and η is the air coefficient of viscosity, α is acoustic aperture radius, and ω is angular frequency, as can be seen from above-mentioned formula, the density of acoustic resistance unit 7 can affect the size in sound-resistance material gap, namely can affecting parameters α, thus can affect the size of acoustic resistance value R7.Therefore, acoustic resistance value R7 is relevant with the density of acoustic resistance unit 7, therefore, by changing the density of acoustic resistance unit 7, just can change the acoustic resistance value R7 of acoustic resistance unit 7, reaching the object regulating the frequency response of earphone overall sound.

The above is the citing of best mode for carrying out the invention, and the part wherein do not addressed in detail is the common practise of those of ordinary skill in the art.Protection scope of the present invention is as the criterion with the content of claim, and any equivalent transformation carried out based on technology enlightenment of the present invention, also within protection scope of the present invention.

Claims (4)

1. be with the earphone of embedded pressure-equalizing device, comprise earphone procapsid and earphone back casing, ear muff is provided with outside described earphone procapsid, described earphone procapsid is provided with front acoustic aperture, described ear muff and described earphone procapsid surround the front operatic tunes, described earphone procapsid and described earphone back casing surround the rear operatic tunes, it is characterized in that: be provided with in the rear operatic tunes that described earphone procapsid and described earphone back casing surround and all press cavity, on described medial surface of all pressing the end face of cavity to be fitted in described earphone procapsid, described all surrounding between pressure cavity and the medial surface of described earphone procapsid all presses chamber, described earphone procapsid is provided with and described first air-vent of all pressing chamber through, described all pressure on the bottom surface of cavity is provided with second air-vent through with the described rear operatic tunes away from the position of described first air-vent,

Acoustic resistance value in described all pressures cavity is R7, and the acoustic resistance value of described first air-vent is R5, and the acoustic resistance value of described second air-vent is R6, and described earphone procapsid and the described acoustic resistance value R of cavity composite entity and the equivalent formulation of acoustic mass L of all pressing are:

$R=\frac{1}{{\mathrm{\π\α}}^3}\sqrt{2\mathrm{\η\ω}{\mathrm{\ρ}}_0}$

$L=\frac{{\mathrm{\ρ}}_{0}l}{{\mathrm{\π\α}}^2}\mathrm{\ω}$

Wherein l is acoustic aperture length, ρ ₀for atmospheric density, η is the air coefficient of viscosity, and α is acoustic aperture radius, and ω is angular frequency;

Described first air-vent is positioned at the peripheral skirt of described earphone procapsid, and described second air-vent is located at all pressing on the bottom surface of cavity of the edge part place of corresponding described earphone procapsid opposite side and away from the position of described first air-vent.

2. the earphone of the embedded pressure-equalizing device of band as claimed in claim 1, is characterized in that: described all pressure in cavity is provided with acoustic resistance unit.

3. the earphone of the embedded pressure-equalizing device of band as claimed in claim 2, is characterized in that: described acoustic resistance unit is the acoustic resistance unit adopting sound-resistance material to realize acoustic resistance.

4. the earphone of the embedded pressure-equalizing device of band as claimed in claim 2, is characterized in that: described acoustic resistance unit is the acoustic resistance unit adopting non-sound-resistance material to realize acoustic resistance.