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…
ANSI/ASA S1.13-2020 Measuring Sound Pressure Levels in Air
Have you heard: the American National Standard ANSI/ASA S1.13-2020: Measurement Of Sound Pressure Levels In Air has been revised. What is Loudness? In the beginning,…