When other sound sources are under further control , the air inlet may become the primary sound source . under this situation it is proposed to apply good intake mufflers . usually the intake muffler needs to combine with the air cleaner in an integrated design to meet requirements of air admission and cleaning as well as perform an effective control over the air inlet noise 而當(dāng)其它聲源得到進(jìn)一步控制后,進(jìn)氣噪聲有可能成為主要聲源,這時(shí)需考慮采用性能良好的進(jìn)氣消聲器,通常進(jìn)氣消聲器要和空氣濾清器結(jié)合,進(jìn)行一體化設(shè)計(jì),既能滿足進(jìn)氣和濾清方面的要求,又可使進(jìn)氣噪聲得到有效的控制。