ASA/ANSI S12.18-1994 (R2023): Sound Pressure Level
Sound pressure is the difference between the pressure from a sound wave and the ambient pressure of what the sound is traveling through (usually air)….
ANSI/AMCA 320-23: Sound Testing Of Fans
A slower fan speed does not produce a lower sound level. So, what determines a silent fan? The lowest fan sound level during operation is…
ASA/ANSI S12.60-2019/Part 4 (R2024): Acoustics in Schools
Excessive background noise or reverberation in physical education spaces interferes with speech communication and thus presents an acoustical impediment to learning. ASA/ANSI S12.60-2019/Part 4 (R2024):…
ANSI ASA S3.7-2016 (R2020): Calibration Of Earphones
Telling the difference between good and bad quality earphones involves evaluating sound quality from measurement and calibration testing. Good headphones should provide clear, balanced sound with…
ASA/ANSI S12.3-2023: Declaration Of Product Noise Emission Values
When anyone is exposed to 8 hours of 85 dBA or higher each workday without proper protection hearing damage may occur. Repeated exposure to loud…
IEC 61000-4-6:2023—Electromagnetic Compatibility Testing
Modern society deals with radio waves constantly, such as when we use our mobile phones, wireless computer networks, and other communications applications. Conducted radio frequency…
IEC 61094-4 Ed. 1.0 b:1995—Working Standard Microphones
Micro (from the Greek word mikros) means “small,” and phone (from the Greek word phone) means “sound” or “voice.” This translates microphone to “small sound,”…
ASA/ANSI S1.18-2018 (R2023): Acoustic Impedance Method
In environmental acoustics, the ground effect is described by its acoustic impedance. By analogy with the electrical or mechanical impedance, the ground impedance effect accounts for…
IEEE/ANSI C63.10-2020: Unlicensed Wireless Devices Compliance Testing
With the longest wavelengths in the electromagnetic spectrum, radio wave emissions derive from cosmic sources throughout the universe. More locally, radiofrequency emissions flourish, thanks to…