共找到 150 條與 聲功率級 相關的標準，共 10 頁
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
本標準規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性。聲功率級的精度在聲功率級測定的基礎噪聲標準所規定的范圍內。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
本標準提供一種有效實施的方法和以內燃機為動力的乎持便攜式割灌機在標準狀態下的聲功率級的測定、表示和驗證的方法。 本標準適用干以內姍機為動力的林業用割灌機。 在用以確定有效聲功率級的基本嗓聲標準的精度所限定的范圍內，本標準的使用確保聲功率級的再現性。根據本標準，聲功率級的測定法為工程法(2級
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
