Device for improving receiver noise
A receiver and circuit board technology, applied in earphone/earphone accessories, etc., can solve the problems of enhanced air eddy current effect, increased raw material cost, affected sound output quality, etc., to achieve bass enhancement, reduce air eddy current effect, and improve howling phenomenon. Effect
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Embodiment 1
[0023] Such as Figure 1-3 As shown, the present invention provides a kind of device that improves receiver howling, comprises electromagnetic shielding housing 10, diaphragm 3, magnetic core coil 5, magnetic induction coil signal line 4, circuit board 9, and electromagnetic shielding housing 10 is set as circular The electromagnetic shielding shell 10 includes a front chamber 1 and a rear chamber 6, the front chamber 1 is provided with a sound transmission port 2, a circuit board 9 is provided on one side of the rear chamber 6, and the circuit board 9 is provided with two wiring holes 8, An opening is provided between the two wiring holes 8, and the opening is made through a stamping and punching molding process. Through holes, the openings on the circuit board 9 are provided with a damping net 7 through glue connection, the material of the damping net 7 is nylon or acrylic fiber, the mesh number of the damping net 7 is 120-500, between the front cavity 1 and the rear cavity ...
Embodiment 2
[0025] The rest is the same as that of Embodiment 1, except that the electromagnetic shielding case 10 is rectangular.
Embodiment 3
[0027] The rest is the same as that of Embodiment 1, except that the electromagnetic shielding case 10 is rectangular.
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