标签: microphone

Microphone_HandbookMicrophoneHandbookTestandMeasurementMicrophonesIntroductionPressurevariations,whetherinair,waterorothermediums,whichthehumanearcandetect,areconsideredsounds.Acousticsisthescienceorthestudyofsound.Soundcanbegenerallypleasingtotheear,asinmusic,orundesirable,referredtoasnoise.Thetypicalaudiblerangeofahealthyhumanearis20to20,000Hz.ASoundPressureLevel(SPL)beyondthedetectablefrequenciesofthehumanearcanalsobeveryimportanttodesignengineers.Noise,VibrationandHarshness(NVH)isconcernedwiththestudyofvibrationandaudiblesounds.Vibrationsrepresentarapidlinearmotionofaparticleorofanelasticsolidaboutanequilibriumposition,orfluctuationofpressurelevel.Harshnessreferstothetreatme……