L(fng)CPx͵ĎׂҪ(sh)
L(fng)CP{(dio)ϵy(tng)ĩbڱĹVҪc£ԳɆԪ{(dio)(ji)`L(fng)CPܙCwС`bռýg^σ(ni)bʩ
(j)I(y)IJͬY(ji)O(sh)ӋDHȥ(yng)ֿ]c
1У
һǰӋؓ(f)Ɂxa(chn)Ʒ(yng)עⲻͬL(fng)oʽ(do)L(fng)CPܵؓ(f)dҲͬ(dng)L(fng)ֱͨ^≦grδ(jng)̎L(fng)CPܵ=҃(ni)ؓ(f) L(fng)ؓ(f)(dng)O(sh)L(fng)ϵy(tng)rtL(fng)CPܵ=҃(ni)ؓ(f)ɡĿǰЈĮa(chn)Ʒһ㶼xH\е(yng)λrg(ni)ƽ\Еrg׃\ЕrgL(fng)Ӱ푙CMݔԲxԽԽãHxÙCMF(xin)^(do)_^QΔ(sh)pҜݶȼӴ߀Ӵϵy(tng)O(sh)ͶY{(dio)ܺļӴ{(dio)ЧHxO(sh)ıҪl֮һ߀(yng)
2L(fng)У
ҪgƷ|(zh)ҪУ˓QΔ(sh)L(fng)زԽСQΔ(sh)Խt՚Ʒ|(zh)ԽԽmʲôеĿ{(dio)gЮζL(fng)У˛]̎<L(fng)CPܵxL(fng)ڲͨˮ՚MډĹryʴһЩЌHأԌH_L(fng)Ǒ(yng)@B(ti)µL(fng)ֵ۳ͨ^(jng)y@aL(fng)(yng)ռxL(fng)2030%
3͡L(fng)ʽ
L(fng)ʽγ^ĚMcֱӰ푵{(dio)gĜضȈٶȈľԺͷ(wn)ԣҲ{(dio)ЧĺÉĚMҪһL(fng)ٶ·ԱCһLL(fng)ȡQڙCoL(fng)L(fng)ڵءCo^(do)L(fng)½̽gO(sh)ӋMcH\РB(ti)Dϴ^ʑ(yng)(j)HĽgĽY(ji)(gu)ʽM߶ȵrxЙnL(fng)L(fng)ָ(bio)(yng)xL(fng)CP̖ĿǰЈϵL(fng)CPSҵęCoֵ]нy(tng)һ(bio)^ټϲֹزõPʽbCMӶL(fng)^VML(fng)ֵ^ڌH؛r_Coֵx30Paеķgx50PaCoֵęCMڳҎ(gu)20PaֵڌH\бCõľ_(d)A(y)ڵĿյЧ
4
aָ(bio)40dBƫL(fng)CPܣb̎bֵ10Pa
bbʩ|(zh)עⱣ|(zh)ˮŷܼ^ϵy(tng)坍
cˮϵy(tng)O(sh)÷ʽˮƽϵy(tng)߀Ǵֱϵy(tng)ֹxôֱϵy(tng)^õıCˮŷC˷gČӸҪ
ͬ
- ʲôҪL(fng)QC?
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