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How To
Speakers Glossary
Hertz? SNR? Dynamic range? What does it all mean? Find out more about audio terminology in our glossary.
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Acoustic feedback
A squealing sound, usually high-pitched, caused when a microphone picks up sound waves from a loudspeaker which is connected to that same microphone.

The portion of sound caused by reverberations from the surrounding environment, instead of directly from the sound source.

The science or the study of sound.

Acoustic Loaded Module (ALM)
A technique that uses concentric chambers to simulate a longer port tube within a smaller space, resulting in a pronounced upper bass.

The ampere (symbol: A) is the SI base unit of electric current. It is named after André-Marie Ampère, one of the main discoverers of electromagnetism.

Amplifier (amp)
An electrical circuit designed to increase the current, voltage, or power of an applied signal.

The relative strength of a signal, expressed as either a negative or positive number.

The reduction, typically by some controlled amount, of an electrical signal.

Analog signal
An analog signal is characterized as continuously variable (rather than making discrete jumps, as is the case with the ones and zeros in a digital signal). In an audio context, such data is usually stored as continuously varying physical undulations (vinyl records) or as variations in a magnetic medium (tape). See Digital

Audio spectrum
An acoustic spectrum of human hearing, generally regarded to be between 20 Hz and 20 kHz.

Audio Noise
See Noise.