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35 relations: Amplifier, Audio feedback, Audio filter, Audio system measurements, Blinded experiment, Compact disc, Confirmation bias, Decibel, Digital filter, Digital-to-analog converter, Dynamic range, Flutter (electronics and communication), Frequency response, Harmonic, Hertz, James Randi, Neil Young, One Million Dollar Paranormal Challenge, Oversampling, Passband, Peter Baxandall, Philosophy, Placebo, Room acoustics, Rumble (noise), Signal-to-noise ratio, Skin effect, Sound intensity, Super Audio CD, Test CD, The Absolute Sound, Thomas Edison, Total harmonic distortion, Wow (recording), Xiph.Org Foundation.
Amplifier
An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).
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Audio feedback
Audio feedback (also known as acoustic feedback, simply as feedback, or the Larsen effect) is a special kind of positive loop gain which occurs when a sound loop exists between an audio input (for example, a microphone or guitar pickup) and an audio output (for example, a power amplified loudspeaker).
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Audio filter
An audio filter is a frequency dependent amplifier circuit, working in the audio frequency range, 0 Hz to beyond 20 kHz.
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Audio system measurements
Audio system measurements are made for several purposes.
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Blinded experiment
A blind or blinded-experiment is an experiment in which information about the test is masked (kept) from the participant, to reduce or eliminate bias, until after a trial outcome is known.
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Compact disc
Compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982.
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Confirmation bias
Confirmation bias, also called confirmatory bias or myside bias,David Perkins, a professor and researcher at the Harvard Graduate School of Education, coined the term "myside bias" referring to a preference for "my" side of an issue.
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Decibel
The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale.
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Digital filter
In signal processing, a digital filter is a system that performs mathematical operations on a sampled, discrete-time signal to reduce or enhance certain aspects of that signal.
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Digital-to-analog converter
In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal.
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Dynamic range
Dynamic range, abbreviated DR, DNR, or DYR is the ratio between the largest and smallest values that a certain quantity can assume.
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Flutter (electronics and communication)
In electronics and communication, flutter is the rapid variation of signal parameters, such as amplitude, phase, and frequency.
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Frequency response
Frequency response is the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.
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Harmonic
A harmonic is any member of the harmonic series, a divergent infinite series.
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Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
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James Randi
James Randi (born Randall James Hamilton Zwinge; August 7, 1928) is a Canadian-American retired stage magician and a scientific skeptic who has extensively challenged paranormal and pseudoscientific claims.
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Neil Young
Neil Percival Young, (born November 12, 1945), is a Canadian singer-songwriter, musician, producer, director and screenwriter.
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One Million Dollar Paranormal Challenge
The One Million Dollar Paranormal Challenge was an offer by the James Randi Educational Foundation (JREF) to pay out one million U.S. dollars to anyone who can demonstrate a supernatural or paranormal ability under agreed-upon scientific testing criteria.
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Oversampling
In signal processing, oversampling is the process of sampling a signal with a sampling frequency significantly higher than the Nyquist rate.
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Passband
A passband is the range of frequencies or wavelengths that can pass through a filter.
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Peter Baxandall
Peter J. Baxandall (1921, Kingston upon Thames, Surrey – 1995, Malvern, Worcestershire) was an English audio engineer and electronics engineer and a pioneer of the use of analog electronics in audio.
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Philosophy
Philosophy (from Greek φιλοσοφία, philosophia, literally "love of wisdom") is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language.
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Placebo
A placebo is a substance or treatment of no intended therapeutic value.
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Room acoustics
Room acoustics describes how sound behaves in an enclosed space.
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Rumble (noise)
A rumble is a continuous deep, resonant sound, such as the sound made by heavy vehicles or thunder.
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Signal-to-noise ratio
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
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Skin effect
Skin effect is the tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the conductor, and decreases with greater depths in the conductor.
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Sound intensity
Sound intensity level also known as acoustic intensity is defined as the power carried by sound waves per unit area in a direction perpendicular to that area.
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Super Audio CD
Super Audio CD (SACD) is a read-only optical disc for audio storage, introduced in 1999.
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Test CD
A Test CD usually refers to a compact disc containing tracks of musical and technical tests and demonstrations.
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The Absolute Sound
The Absolute Sound (TAS) is an American magazine which reviews audiophile-oriented sound-reproduction equipment, along with recordings and comments on various music-related subjects.
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Thomas Edison
Thomas Alva Edison (February 11, 1847October 18, 1931) was an American inventor and businessman, who has been described as America's greatest inventor.
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Total harmonic distortion
The total harmonic distortion (THD) is a measurement of the harmonic distortion present in a signal and is defined as the ratio of the sum of the powers of all harmonic components to the power of the fundamental frequency.
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Wow (recording)
Wow is a relatively slow form of flutter (pitch variation) that can affect gramophone records and tape recorders.
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Xiph.Org Foundation
Xiph.Org Foundation is a non-profit organization that produces free multimedia formats and software tools.
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References
[1] https://en.wikipedia.org/wiki/Audio_equipment_testing
