The utility model provides an active noise reduction headset, which can not only adjust the air flow balance, but also maintain the rich and low frequency of the headset. The active noise reduction headphone includes the headphone main body, which includes the front cover, earmuff and back cover. The earmuff and back cover are located on both sides of the front cover, the front cover and earmuff are enclosed in the front cavity of the headphone, the front cover and the back cover are enclosed in the back cavity of the headphone, and the front cover is enclosed with a pneumatic balance hole; the front cover is equipped with a pneumatic balance adjustment component corresponding to the pneumatic balance hole, and the pneumatic balance adjustment component is a cover gas. The air cushion of the pressure balance hole or the automatic reset baffle can be opened and closed. The utility model has an active noise-reducing headset, because the air pressure balance adjusting part is arranged at the air pressure balance hole, the aperture of the air pressure balance hole can be increased without excessive leakage of low-frequency sound. When the air velocity in the front chamber is high, the larger the aperture of the air pressure balance hole is, the faster the air pressure is released, and the strong pressure pressure pressure in the earmuff can be avoided, which causes the vibration diaphragm of the horn and the feedback microphone to howl. And so on.
【技术实现步骤摘要】
一种有源降噪耳机
本技术属于耳机领域，具体是一种有源降噪耳机。
技术介绍
现有有源降噪耳机通常是耳罩式耳机，耳罩式有源降噪耳机都有气压平衡设计，来避免耳罩佩戴后由于调整或挤压时耳机前腔内空气压力突然变大对佩戴者耳膜形成的低频气流冲击，并可以缓解甚至避免气流冲击反馈麦克风造成的啸叫噪音。现有耳罩式有源降噪耳机的气压平衡设计通常有两种方式，一种是通过在喇叭前盖1上开一个通透的小孔（气压平衡孔2）连通外界，如图1所示，来对耳机前腔3内的空气压力进行泄压，保持前腔和外界气压平衡；另一种方式是在前腔内使用一根长导气管联通到后腔盖之外进行泄压，同时利用导气管内的空气柱形成的等效声阻尼来减小低频声音的泄露损失，并提升外界噪声的隔绝能力。其中第一种方式，为减小低频声音泄露，气压平衡孔的孔径一般较小，通常在0.5-1mm左右，孔径小导致前腔内气流速度快时泄气慢、气压平衡慢，耳罩内强烈的气压会造成喇叭和反馈麦克风的振动膜片处于非原始平衡位置，进而造成啸叫等不良发生；对于第二种方式，由于声阻尼大小与导气管的长度有关，导气管长度越大声阻尼越大，而受限于耳机空间尺寸的限制，导气管的长度有限...
【技术保护点】
1.一种有源降噪耳机，包括耳机主体，所述耳机主体包括前盖、耳罩和后盖，所述耳罩和所述后盖分别位于所述前盖的两侧，所述前盖与所述耳罩围成耳机前腔，所述前盖和所述后盖围成耳机后腔，所述前盖上设有使所述耳机前腔与外界导通的气压平衡孔；其特征在于：所述前盖上设有与所述气压平衡孔对应的气压平衡调节部件，所述气压平衡调节部件为覆盖所述气压平衡孔的透气垫或可开闭的自动复位挡板。
【技术特征摘要】
1.一种有源降噪耳机，包括耳机主体，所述耳机主体包括前盖、耳罩和后盖，所述耳罩和所述后盖分别位于所述前盖的两侧，所述前盖与所述耳罩围成耳机前腔，所述前盖和所述后盖围成耳机后腔，所述前盖上设有使所述耳机前腔与外界导通的气压平衡孔；其特征在于：所述前盖上设有与所述气压平衡孔对应的气压平衡调节部件，所述气压平衡调节部件为覆盖所述气压平衡孔的透气垫或可开闭的自动复位挡板。2.根据权利要求1所述的有源降噪耳机，其特征在于：所述气压平衡孔的孔径为1-10mm。3.根据权利要求2所述的有源降噪耳机，其特征在于：所述气压平衡孔的数量为1-5个，在所述前盖上沿圆周均布。4.根据权利要求1所述的有源降噪耳机，其特征在于：所述透气垫的材质为可压缩多孔材料。5.根据权利要求1至4中任一项所述的有源降噪耳机，其特征在于：所述透气垫为固设在所述前盖上的一个...
【专利技术属性】
技术研发人员：华洋，林孟钊，温晓峰，佀艳红，
申请(专利权)人：潍坊歌尔电子有限公司，
类型：新型
国别省市：山东,37
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