acoustics

Sound frequency measured in hertz (Hz) tells you how many times per second a sound wave repeats, which your brain interprets as pitch. A higher hertz count means a higher percei...

Sound waves are longitudinal pressure vibrations that travel through air, water, solids, and other media by pushing molecules together and apart. These waves carry energy withou...

An echo is a distinct reflection of sound that arrives at the listener at least 50 to 100 milliseconds after the original sound, which is roughly 17 to 34 meters of travel dista...

The phrase “quietest room” usually refers to a space designed to reach the lowest possible background sound level, often an anechoic or extremely quiet test chamber. These r...

The phenomenon of beats results from sound when two sound waves of slightly different frequencies interfere, creating a pulsing variation in loudness known as beating. Instead o...

Ligature neck compression refers to the reduction in apparent diameter of a string at the point where it contacts the edge of a nut or saddle, or where it is pressed by a ligatu...

This curated list presents leading acoustical associations and organizations in the United States that serve professionals, set standards, provide education, and support researc...

Organizations dedicated to acoustics play a key role in standards development, professional certification, research dissemination, and public outreach in the United States. This...