如可以无限细化的FFT - FT方法,二次FFT以及把倍频程应用到声压级测量中,使PDM2000系统更完善。
For example, FFT-FT, two times FFT and octave using in sound measure. All this improvement makes PDM2000 system more perfect.
声压级及声功率级的测量和计算。
Measurement and calculation of sound pressure level and sound power level.
声压级及声功率级的测量和计算。
Measurement and calculation of sound pressure level and sound power level.
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