共找到 150 條與 聲功率級(jí) 相關(guān)的標(biāo)準(zhǔn)，共 10 頁(yè)
Sound power levels of noise sources-Survey method for determination of sound power levels of noise sources
Sound power levels of noise sources-Precision methods for determination of sound power levels for broad-band sources in reverberation rooms
Sound power levels of noise sources-Precision methods for determination of sound power levels for broad-band sources in reverberation rooms
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(biāo)準(zhǔn)規(guī)定了油鋸聲功率級(jí)的測(cè)定方法。 本標(biāo)準(zhǔn)提供了在標(biāo)準(zhǔn)化條件下測(cè)定、標(biāo)示和驗(yàn)證主要用于林業(yè)的油鋸的聲功率級(jí)所必需的全部信息。 本標(biāo)準(zhǔn)的使用確保聲功率級(jí)測(cè)定值的再現(xiàn)性。聲功率級(jí)的精度在聲功率級(jí)測(cè)定的基礎(chǔ)噪聲標(biāo)準(zhǔn)所規(guī)定的范圍內(nèi)。按照本標(biāo)準(zhǔn)，聲功率級(jí)測(cè)定的首選方法是工程法(2級(jí)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
本標(biāo)準(zhǔn)提供一種有效實(shí)施的方法和以?xún)?nèi)燃機(jī)為動(dòng)力的乎持便攜式割灌機(jī)在標(biāo)準(zhǔn)狀態(tài)下的聲功率級(jí)的測(cè)定、表示和驗(yàn)證的方法。 本標(biāo)準(zhǔn)適用干以?xún)?nèi)姍機(jī)為動(dòng)力的林業(yè)用割灌機(jī)。 在用以確定有效聲功率級(jí)的基本嗓聲標(biāo)準(zhǔn)的精度所限定的范圍內(nèi)，本標(biāo)準(zhǔn)的使用確保聲功率級(jí)的再現(xiàn)性。根據(jù)本標(biāo)準(zhǔn)，聲功率級(jí)的測(cè)定法為工程法(2級(jí)
Brush-cutters.Determination of sound power levels.
Sound power levels of noise sources-Precision methods for determination of sound power levels for discrete-frequency and narrow-band sources in reverberation rooms
Schválenie ST SEV 4445-83 odporu?ilo í ederálne ministerstvo elektrotechnického príemyslu. Spracovatel a odborové normaliza?ně st?edisko: Závody
Power transformers Determinatlon of sound power level
Sound power levels of noise sources-Precision methods for determination of sound power levels for discrete-frequency and narrow-band sources in reverberation rooms
Acoustics. Determination of sound power levels of noise sources. Requirements for the performance and calibration of reference sound sources
To apply Sound Power Level Ratings in the design of an air system, the engineer must understand what these ratings are and he must appreciate
Application of Sound Power Level Ratings for Fans
To apply Sound Power Level Ratings in the design of an air system, the engineer must understand what these ratings are and he must appreciate
Application of Sound Power Level Ratings for Fans
