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            <p><a href="http://rsgzd.cn"><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��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����_��较细�Q�线密度较小�Q�的���提琴��u比较�_�（�U�密度较大）的振动快�Q�发音也高；一根��u的发音会随着弦��u拧紧而音升高�?/p>
<div>不同的乐器和人声会发出各�U�音质（也叫做音�Ԍ��quality�Q�不同的声音�Q�这是因为几乎所有的振动都是复合的。如一�Ҏ(gu��)��在发音的���提琴��u不仅全长振动�Q�各分段同时也在振动�Q�根据分�D�各自不同的长度发音。这些分�D�|��动发出的音不易用听觉辨别出来�Q�然而这些音都纳入了整体韛_��效果。泛韛_��中的��M��一个音�Q�如G、D或B�Q�的泛音的数目都是随八度�q�箋升高而倍增。泛音的�U�数�q�可说明各泛音的频率与基音频率的比率。如大字�l?ldquo;G&rdquo;的频率是每秒钟振�?6�ơ，高音��p��上的&ldquo;B&rdquo;�Q�第五泛韻I��的振动次数是5&times;96=480�Q�即每秒钟振�?80�ơ�?/div>
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