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ANSI/AMCA Standard 210 - Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating establishes uniform test methods for a laboratory test of a fan or other air moving device to determine its aerodynamic performance in terms of airflow rate, pressure developed, power consumption, air density, speed of rotation, and ...
According to Stevens' definition, a loudness of 1 sone is equivalent to 40 phons (a 1 kHz tone at 40 dB SPL). [1] The phons scale aligns with dB, not with loudness, so the sone and phon scales are not proportional. Rather, the loudness in sones is, at least very nearly, a power law function of the signal intensity, with an exponent of 0.3.
Others, such as ISO 532A (Stevens loudness, measured in sones), ISO 532B (Zwicker loudness), DIN 45631 and ASA/ANSI S3.4, have a more general scope and are often used to characterize loudness of environmental noise. More modern standards, such as Nordtest ACOU112 and ISO/AWI 532-3 (in progress) take into account other components of loudness ...
Topping the list are roofers, with more than 3 million inquiries in 2011, up a whopping 39% over 2010. ... Third from the bottom were car salespeople, with 47% rating their honesty and ethics as ...
(The Center Square) – Last month, President Donald Trump signed an executive order banning medical providers from performing gender reassignment or affirming procedures, such as mastectomies or ...
Uncle John's Bathroom Reader is a series of books containing trivia and short essays on miscellaneous topics, ostensibly for reading in the bathroom. [1] The books are credited to the Bathroom Readers' Institute, though Uncle John is a real person named John Javna, who created the series along with his brother Gordon, as well as a team of assistants.
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