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,” […]
Acoustics and 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, […]
ANSI/ASA S12.6-2016 Hearing Protectors Real-Ear Attenuation
The human ear, despite being an incredibly complex system, comprising sensory organs, bones, and other anatomical structures, can have its usefulness easily detracted from, or […]
ANSI/ASSP A10.46-2020: Construction Hearing Loss Prevention
Transmitting sounds through our internal hammer, anvil, and stirrup—paired with a variety of auditory structures—is one of the five main ways in which we sense […]
ANSI/ASA S12.2-2019: Criteria For Evaluating Room Noise
Background Noise Distractions and Harm All noises are in your head. After sound causes the eardrum to vibrate, a series of processes occur, and the […]
Procedure For Determining Audiograms In Toothed Whales (Odontocetes)
Communication isn’t unique to human society, nor is it confined to the terrestrial world. Whales, as highly-intelligent mammals bound to the sea—and whales are mammals, […]
ASME PTC 36-2018: Measurement of Industrial Noise
ASME PTC 36-2018: Measurement of Industrial Noise has been released. As it is a revision of ASME PTC 36-2004 (R2013), there are some modifications to […]
Measuring Noise Reduction in Hearing Protective Devices: Labeling Requirements and Guidelines
In the United States, you may come across hearing protection devices, such as earplugs, that are labeled as being compliant with ANSI S3.19-1974. Minimal background […]