A kind of double horn earphone

Abstract

The invention provides a dual-speaker headphone comprising a hollow shell, a bass passive radiator located in the shell, a tweeter and a woofer. The tweeter is opposite to the woofer. An inner cavity of the shell is divided into a front cavity for accommodating the tweeter and a rear cavity for accommodating the woofer by the bass passive radiator. The structure edge of each of the woofer and the tweeter is provided with a smooth surface, and a sound surface of each of the woofer and the tweeter faces the outside of the shell. A conical diffuser is disposed in front of the back of the woofer while another conical diffuser is disposed in front of the sound surface of the tweeter. As to the part of the shell, used for forming the rear cavity, the area corresponding to the sound surface of the woofer is in a mesh enclosure structure, and the area connected with the bass passive radiator is provided with a pressure-equalizing inverter hole or pressure-equalizing inverter tube. An independent sound cavity provided with a pressure-equalizing inverter hole or pressure-equalizing inverter tube is further formed in the front cavity. The tweeter is located in the independent sound cavity. The dual-speaker headphone is capable of inhibiting wind noise and standing wave, so that sound pressure balance is improved and eardrum stress is relieved.

Description

technical field [0001] The invention relates to the technical field of earphones, in particular to a double-speaker earphone. Background technique [0002] Such as figure 1 As shown, the acoustic structure of the existing headphones generally includes an ear shell 10, a horn (speaker) 11 located inside the ear shell 10, and an earmuff 12 nested on the ear shell. The ear shell 10 generally consists of a front shell and a rear shell. , the front chamber 13 and the rear chamber 14 are respectively formed at intervals of the horns 11 . Wherein, the structural section of the horn 11 is connected to the edge (such as figure 1 The dotted line boxes a and b) are designed with sharp edges and corners. The sound-emitting surface 110 of the diaphragm of the speaker 11 and the front and rear shell surfaces of the ear shell 10 are mostly designed in a nearly parallel manner, and the rear shell is mostly of a closed design. , and only add simple pressure equalizing holes 100 to adjust ...

AI Technical Summary

Problems solved by technology

[0004] 1. Existence of wind noise: Since the structural section of the horn and the junction of the surface are all designed with sharp edges and corners, when the instantaneous sound velocity inside the front and rear chambers is relatively high, the pulsating mutual interference modulation sound wave of the cutting air flow (wind noise ), when this sound wave is generated more, the sound clarity of the headphone system will be reduced to a certain extent

[0005] 2. Distortion caused by standing waves: Usually, the sounding surface of the diaphragm of the headphone speaker and the surface of the front and rear shells are almost parallel in design, so there will be more standing waves, resulting in the sound pressure at certain points in the cavity. Enhanced and weakened at some points, so the sound pressure in the front and rear chambers is uneven, so the sound pressure after synthesis is uneven and causes sound distortion

[0007] 4. The sound wave balance and resonance frequency selection characteristics of the front and rear chambers are not good: usually the back shell of the earphone only uses pressure equalization holes to adjust the sound pressure equalization characteristics of the front and rear chambers, which may easily cause the sound pressure of a certain frequency band during the sound pressure equalization process. The inconsistency of compression and synthesis affects the sound wave balance and resonance frequency selection characteristics of the front and rear cavity

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