共找到 150 條與 聲功率 相關(guān)的標準，共 10 頁
Sound power levels of noise sources-Survey method for determination of sound power levels of noise sources
本規(guī)程適用于超聲功率為(0.5～20)W范圍內(nèi)的瓦級超聲功率計的首次檢定、后續(xù)檢定和使用中的檢驗
Ultrasonic Power Meters for watt Level
本規(guī)范適用于通過在已知測量表面上的表面聲壓級和測量表面面積換算成聲功率級的聲功率計的校準
Calibration Specification for Sound Powder Meters
Sound power levels of noise sources-Precision methods for determination of sound power levels for broad-band sources in reverberation rooms
Ultrasonic Power Meter for Milliwatt Level
Sound power levels of noise sources-Precision methods for determination of sound power levels for broad-band sources in reverberation rooms
Ultrasonic power measuring instrument
本標準規(guī)定了0.5～10MHz頻率范圍內(nèi)，用于水中的標準超聲功率源的主要性能參數(shù)，各分部的技術(shù)要求以及校準和使用方法。 標準超聲功率源是一種穩(wěn)定的、已知輸出超聲聲功率的單頻超聲功率源。它由超聲頻振蕩器、阻抗匹配器與換能器組成。它主要用作超聲聲功率測量的傳遞標準，以比對和校準各種超聲聲
Acoustics. Standard ultrasonic power source
This procedure defines a method of measurement for Noise Power Ratio (NPR) of active Cable Telecommunications equipment. It is intended
Measurement Procedure for Noise Power Ratio
Standard Ultrasonic Sources for Watt-level
Sound power levels of noise sources-Engineering methods for determination of sound power levels for sources in special reverberation test rooms
Sound power levels of noise sources-Engineering methods for determination of sound power levels for sources in special reverberation test rooms
Useful for equipment that cannot be removed for acoustical testing
Sound power levels of noise sources-Survey method for determination of sound power levels of noise sources using a reference sound source
本標準規(guī)定了油鋸聲功率級的測定方法。 本標準提供了在標準化條件下測定、標示和驗證主要用于林業(yè)的油鋸的聲功率級所必需的全部信息。 本標準的使用確保聲功率級測定值的再現(xiàn)性。聲功率級的精度在聲功率級測定的基礎(chǔ)噪聲標準所規(guī)定的范圍內(nèi)。按照本標準，聲功率級測定的首選方法是工程法(2級精度
Portable chain saws.Determination of sound power levels
Sound power levels of noise sources-Precision methods for determination of sound power levels for sources in anechoic and semi-anechoic rooms
