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15 relations: Active noise control, Active vibration control, Ambient noise level, Decibel, Electric battery, Frequency, Headphones, Headset (audio), Insomnia, Microphone, Noise-canceling microphone, Rechargeable battery, Signal-to-noise ratio, Soundproofing, Throat microphone.
Active noise control
Active noise control (ANC), also known as noise cancellation, or active noise reduction (ANR), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first.
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Active vibration control
Active vibration control is the active application of force in an equal and opposite fashion to the forces imposed by external vibration.
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Ambient noise level
In atmospheric sounding and noise pollution, ambient noise level (sometimes called background noise level, reference sound level, or room noise level) is the background sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source.
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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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Electric battery
An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars.
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Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
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Headphones
Headphones (or head-phones in the early days of telephony and radio) are a pair of small loudspeaker drivers worn on or around the head over a user's ears.
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Headset (audio)
A headset combines a headphone with a microphone.
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Insomnia
Insomnia, also known as sleeplessness, is a sleep disorder where people have trouble sleeping.
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Microphone
A microphone, colloquially nicknamed mic or mike, is a transducer that converts sound into an electrical signal.
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Noise-canceling microphone
A noise-canceling microphone is a microphone that is designed to filter ambient noise from the desired sound, which is especially useful in noisy environments.
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Rechargeable battery
A rechargeable battery, storage battery, secondary cell, or accumulator is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use.
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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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Soundproofing
Soundproofing is any means of reducing the sound pressure with respect to a specified sound source and receptor.
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Throat microphone
A throat microphone, also laryngophone, is a type of contact microphone that absorbs vibrations directly from the wearer's throat by way of single or dual sensors worn against the neck.
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References
[1] https://en.wikipedia.org/wiki/Noise-cancelling_headphones
