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            <div   id="jigo8we"   class="author"> By <a href="javascript:;"> <a href="/cdn-cgi/l/email-protection#46">���岩声学</a> </a> </div>
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            <p><a href="https://wifiadunion.com"><span style="color: rgb(255, 0, 0);">&nbsp;声学公司</span></a>较小的乐器��生的振动较快�Q�较大的乐器产生的振动较慢。如双簧���的发音比它同类的大���要高。同��L(f��ng)��道理�Q�小提琴的发��x��大提琴高�Q�小男孩的嗓��x��青年男子的嗓音高�{�等。制�U�音高的�q�有其他一些因素，如振动体的质量和张力。�ȝ����_(d��)��较细�Q�线密度较小�Q�的���提琴��u比较�_�（�U�密度较大）(j��)的振动快�Q�发音也高；一根��u的发音会(x��)随着弦��u拧紧而音升高�?/p>
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