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2. Noise-equivalent flux density - Wikipedia

   en.wikipedia.org/wiki/Noise-equivalent_flux_density

   The NEFD can be related to a light detector's noise-equivalent power for a collection area A and a photon bandwidth by: N E F D = η N E P A ν {\displaystyle NEFD=\eta {\frac {NEP}{A u }}} , where a factor η {\displaystyle \eta } (often 2, in the case of switching between measuring a source and measuring off-source) accounts for the photon ...

3. Noise-equivalent power - Wikipedia

   en.wikipedia.org/wiki/Noise-equivalent_power

   Noise-equivalent power (NEP) is a measure of the sensitivity of a photodetector or detector system. It is defined as the signal power that gives a signal-to-noise ratio of one in a one hertz output bandwidth. [1] An output bandwidth of one hertz is equivalent to half a second of integration time. [2] The units of NEP are watts per square root ...

4. AirPods - Wikipedia

   en.wikipedia.org/wiki/AirPods

   Website. apple .com /airpods. AirPods are wireless Bluetooth earbuds designed by Apple. They were first announced on September 7, 2016, alongside the iPhone 7. Within two years, they became Apple's most popular accessory. [4] [5] AirPods are Apple's entry-level wireless headphones, sold alongside the AirPods Pro and AirPods Max .

5. Noise-equivalent temperature - Wikipedia

   en.wikipedia.org/wiki/Noise-equivalent_temperature

   Noise-equivalent temperature (NET) is a measure of the sensitivity of a detector of thermal radiation in the infrared, terahertz or microwave portions of the electromagnetic spectrum. It is the amount of incident signal temperature that would be needed to match the internal noise of the detector such that the signal-to-noise ratio is equal to one.

6. Phonon noise - Wikipedia

   en.wikipedia.org/wiki/Phonon_noise

   Phonon noise, also known as thermal fluctuation noise, arises from the random exchange of energy between a thermal mass and its surrounding environment. This energy is quantized in the form of phonons. Each phonon has an energy of order , where is the Boltzmann constant and is the temperature. The random exchange of energy leads to fluctuations ...

7. Noise (electronics) - Wikipedia

   en.wikipedia.org/wiki/Noise_(electronics)

   In electronics, noise is an unwanted disturbance in an electrical signal. [1] : 5. Noise generated by electronic devices varies greatly as it is produced by several different effects. In particular, noise is inherent in physics and central to thermodynamics. Any conductor with electrical resistance will generate thermal noise inherently.