- Acoustics: The qualities or characteristics of a room, auditorium etc., that determine the audibility or fidelity of sounds in it
- Anechoic: Without an echo
- Anechoic chamber : A room used for acoustical measurements where its design suppresses internal sound reflections
- Bass: Low in pitch, the lowest range of audible frequencies
- Beaming: Sound being emitted with a small sold angle. This sound is more acute as frequency increases.
- Boomy: An excessive bass response with various peaks in it
- Bright: Too much upper frequency energy
- Coherence: How well integrated the sound of the system is
- Diffraction: A change in the direction of sound energy. Dispersion caused by a boundary, such as the edge of a reflective or absorptive surface.
- Distortion: Anything that alters the musical signal
- Dynamic range : The range between the loudest and softest sounds that are in a piece of music, or that can be reproduced by a piece of audio equipment without any distortion.
- Extension: How extended a range of frequencies the device can reproduce accurately.
- Fidelity: How faithful the sound quality is to the original.
- Free field: An environment where a sound wave may disseminate in all directions without obstructions or reflections. An anechoic room produces this environment in controlled conditions.
- Frequency: The measure of rapidity of alterations of a periodic signal, expressed in cycles per second / Hz.
- Frequency response : The changes in the sensitivity of a circuit, device, or room with frequency.
- Hertz: The unit of frequency, abbreviated to Hz
- Imaging: A good stereo system can provide a stereo image that has width, depth and height.
- KHz: 1,000 Hz
- Reflection: The reflection of sound from one surface, which changes the direction of the sound wave.
- Sound: The sensation produced by stimulation of hearing organs by vibrations transmitted through the air or other medium.
- Soundstage: A stereo image that replicates the original performance.
- Spectrum: The distribution of energy of a signal with frequency.
- Timbre: The quality of sound that distinguishes it from other sounds of the same pitch and volume / the distinctive tone of instrument or singing voice.
- Tonal: Audible sound capable of stimulating an auditory sensation having pitch.
- Tone: Quality or character of sound.
- Transparency: The more “transparent” a sound, the clearer the auditory picture.
- Treble: The higher frequencies of the audible spectrum.
- Warmth: In terms of frequency, generally considered to be the range from 150Hz – 400Hz.
- Watt: Unit to measure electrical or acoustical power.
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