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ŷϵy(tng)зֹ(dng)

C(j)a(chn)ʎͨC(j)еO(sh)Ӌ(j)ԸM(jn)ӞVȻ@ЩQijɹ޵̎(yng)ԓ]O(sh)(dng)(dng)ĽQĶͨ^ŷͷŴϵy(tng)ʎ}

ͨݲVľ

(dng)ڸl°l(f)˂y(tng)(dng)^VõͨݲVͨVʹŷϵy(tng)ĸl푑(yng)l(f)˥pĶŷϵy(tng)ĎmȻбҪõͨVܱMϲĎKЧ(hu)׃øԓVĽֹlʷ15 kHzF(xin)ŷ늙C(j)Ԅ(dng)ͨVM(jn)O(sh)Ķڈ(zh)Ԅ(dng){(dio)r(sh)Ml푑(yng)

ݲV͎VƿɌʎ500-1000Ɲ֮gԓ •{(dio)(ji)r(sh)gL(dng)eߣǴچ}ԓlʷ߀ڙC(j)ĿÎcͨVȣݲVһ(xing)(yu)ܱŷϵy(tng)ĸl푑(yng)@ζ̎ܰȫث@{(dio)C档һɂ(g)ݲVcͨVһʹʹŷϵy(tng)@÷(wn)푑(yng)@?yn)ԓV5001000Hz(ni)چ}lݲVlʺ͎r(sh)(hu)a(chn)һ(g)y}̎ڙzyC(j)Ȼr(sh)ܸ(j)(wn)ıO(sh){(dio)C(hu)ɘOҵ(dng)ͨ^пٸ~׃Q(FFT)ܛ״_C(j)Ĺlʡ

ŷϵy(tng)ͨ^ݲVlʹ@һ^̣ŴĜy^̣ǰ~M(jn)һ(sh)ʾɜyݔ̖(ho)lǘӣŴ·ܜyl(yng)O(sh)ݲVlʎݲVԄ(dng)O(sh)ÿp(dng)һNֶmȻݲVcŷg(sh)ĵͨVһʹпŷŴδ@һ¹ܡ

mȻͨVݲVSŷϵy(tng)(dng)C(j)10~500 Hzlʮa(chn)(dng)r(sh)l(f)]ÅsС˽Q@һ}̎ʹùƺ(dng)M(jn)g(sh)

԰늙C(j)Sigma -5ŷŴơDf˷ŴĹκ͜pپп ԺͿҕԣDʾ(dng)ܿһ(g)λ(dng)Y(ji)r(sh)pʎĶsλõ{(dio)(ji)r(sh)gڡ(dng)ע

ʹٶȺD(zhun)̖(ho)늙C(j)D(zhun)r(sh)R(sh)elȻ·ٶȷ̖(ho)M(jn)ylԄ(dng)ԓϢڷŴTҲɌ˜y(sh)wք(dng)O(sh)lҪÑ߀ք(dng){(dio)(sh)a(b)͞Vr(sh)g(sh)M(jn)һŷ

(dng)ܿɅλM(jn)^V(j)lʅ(sh)λ(dng)M(jn)a(b)ԓܿɌ_a(b)ָM(jn)Ӌ(j)mr(sh)ظ(j)lʅ(sh)͌㷨ʹ@һָŷŴ㷨Ԅ(dng)zyĂ(g)(sh)Ԅ(dng){(dio)r(sh)M(jn)O(sh)ãɹ̎ք(dng)O(sh)ԓܿڄ(dng)Y(ji)r(sh)l(f)a(b)λõąĶǰzy(dng)M(jn)a(b)Дؓ(f)d

ͨ^ڄ(dng)Y(ji)r(sh)p(dng)ʹSC(j){(dio)(ji)r(sh)gs̡@N̎ڏ(f)sķDŽؓ(f)ɵϵy(tng)dzБҴؓ(f)ɵTܱǴϵy(tng)һ(g)ܺõķ

(jng)C@Щg(sh)N;аl(f)]á̎C(j)F(xin)W(xu)܆}̓(yu)OEMO(sh)Ӌ(j)

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