A portable bluetooth headset

Abstract

The invention discloses a portable bluetooth earphone, which relates to the field of earphone equipment, and comprises a first half shell. A sound-emitting connecting pipe is arranged at the junction of the lower end of the first half-shell and the second half-shell, and a leading sound hole is arranged in the sound-emitting connecting pipe. Low-pass filter, the low-pass filter is located on the lower side of the front sound hole, the rear sound hole is arranged on the upper side of the front sound hole and communicates with the front sound hole, the first half-shell and the second half-shell are combined with a sound unit and In the rear chamber, the lower end of the sounding unit extends into the rear sound guide hole, the upper end of the sounding unit extends into the rear chamber, the right end of the second half-shell is provided with a wire pipe, the left end of the wire pipe extends into the rear chamber, and the upper end of the sounding unit is provided with a headphone cable. The other end of the earphone wire extends into the wire tube, and the upper ends of the first half shell and the second half shell are provided with a rear cavity cover, and at least part of the rear cavity cover has an absorption and diffraction structure. The invention reduces noise burrs, improves listening effect, reduces sound wave loss, and has good use effect.

Description

technical field [0001] The invention relates to the field of earphone equipment, in particular to a portable bluetooth earphone. Background technique [0002] A single-action iron unit of an earphone is provided with a rear-end air intake hole to increase the air intake, thereby effectively exerting its low-frequency acoustic performance. However, when the single-acting iron unit makes a sound, a small amount of sound waves will be generated from the rear air intake. However, because the existing headphone sealed cavity structure has no spare space in the rear cavity, the sound waves generated by the rear air intake will be absorbed. The reflection of the rear cavity cover causes the sound waves emitted by the rear air intake to return to the single moving iron unit and recombine with the sound waves emitted by the unit diaphragm, which interferes with the normal sound production to a certain extent, and the actual low-frequency sound pressure will be lower than the design. ...

AI Technical Summary

Problems solved by technology

However, when the single-acting iron unit makes a sound, a small amount of sound waves will be generated from the rear air intake. However, because the existing headphone sealed cavity structure has no spare space in the rear cavity, the sound waves generated by the rear air intake will be absorbed. The reflection of the rear cavity cover causes the sound waves emitted by the rear air intake to return to the single moving iron unit and recombine with the sound waves emitted by the unit diaphragm, which interferes with the normal sound production to a certain extent, and the actual low-frequency sound pressure will be lower than the design. Sound pressure

[0003] In addition, the front cavity of the existing earphones uses a straight-through sound guide tube structure without acoustic treatment, so it will cause a certain degree of comb filter effect (repeated standing waves in the tube), making the middle and high frequencies have obvious burrs An unpleasant condition that interferes with the transmission of sound

Moreover, most of the sound guide tubes used in existing earphones are plastic tubes, and the inner wall is relatively rough. At the same time, the material itself has a certain degree of flexibility, so that the sound waves will be offset and absorbed to a certain extent, and unnecessary reverberation will be generated. , thereby reducing the quality of listening, so we propose a portable bluetooth headset with good sound effects to solve the above problems

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