家庭影院需要重现山崩海啸、飞机起飞,导弹发射等场面,这时的声音中都有极深、极强的低音分量,频率需低到20Hz～25Hz,且有足够的响度,才能获得接近真实的感受。 产生低音有两个不利的因素:第一,低音的音量与被推动的气体体积有直接关系。只有口径大,行程长的喇叭单元才能产生量度足的低频功率。因此,低音箱的体积往往相当巨大。第二,人耳的响度感觉与频率有直 Home theater needs to reproduce landslides and tsunamis, aircraft takeoff, missile launches and other scenes, when the sound has a very deep, strong bass components, the frequency needs to be as low as 20Hz ~ 25Hz, and have enough loudness in order to get close to reality Feeling. There are two disadvantages to producing bass: First, the volume of the bass is directly related to the volume of gas being propelled. Only a large caliber, long trip speaker unit to produce sufficient measurement of low-frequency power. Therefore, the volume of bass cabinets is often quite large. Second, the loudness of the human ear and the frequency of the straight