IEEE 1932.1-2024: Licensed and Unlicensed Wireless Networks
Licensed and unlicensed wireless networks are different ways of using the radio spectrum to transmit and receive information. For a licensed spectrum, the government assigns these…
ANSI/ASA S3.2-2020: Speech Intelligibility
Loudspeaker systems can be used for sound reinforcement in theaters and concert halls; microphones are used in many applications, including telephones, hearing aids, public address systems…
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,”…