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  2. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    Industrial noise control is a subset of interior architectural control of noise, with emphasis on specific methods of sound isolation from industrial machinery and for protection of workers at their task stations. Sound masking is the active addition of noise to reduce the annoyance of certain sounds, the opposite of soundproofing.

  3. Noise temperature - Wikipedia

    en.wikipedia.org/wiki/Noise_temperature

    is the noise temperature (K, kelvin) Thus the noise temperature is proportional to the power spectral density of the noise, /. That is the power that would be absorbed from the component or source by a matched load. Noise temperature is generally a function of frequency, unlike that of an ideal resistor which is simply equal to the actual ...

  4. Acoustical engineering - Wikipedia

    en.wikipedia.org/wiki/Acoustical_engineering

    Other techniques to reduce product noise include vibration isolation, application of acoustic absorbent and acoustic enclosures. Acoustical engineering can go beyond noise control to look at what is the best sound for a product, [ 21 ] for instance, manipulating the sound of door closures on automobiles .

  5. How to Reduce Noise Pollution in Your Yard

    www.aol.com/news/2010-05-27-how-to-reduce-noise...

    Several "green" solutions exist that, when combined, can reduce the perception of noise. Here are some things you can do. Show comments. Advertisement. Advertisement. Holiday Shopping Guides.

  6. Soundproofing - Wikipedia

    en.wikipedia.org/wiki/Soundproofing

    A pair of headphones being tested inside an anechoic chamber for soundproofing. Soundproofing is any means of impeding sound propagation.There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using ...

  7. Acoustical measurements and instrumentation - Wikipedia

    en.wikipedia.org/wiki/Acoustical_measurements...

    Here, examples include tweaking an automobile door latching mechanism to impress a consumer with a satisfying click or modifying an exhaust manifold to change the tone of an engine's rumble. Aircraft designers are also using acoustic instrumentation to reduce the noise generated on takeoff and landing.

  8. Thermistor - Wikipedia

    en.wikipedia.org/wiki/Thermistor

    An NTC is commonly used as a temperature sensor, or in series with a circuit as an inrush current limiter. With PTC thermistors, resistance increases as temperature rises; usually because of increased thermal lattice agitations, particularly those of impurities and imperfections. PTC thermistors are commonly installed in series with a circuit ...

  9. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    Operation of the supplemental heat is controlled by a second stage heating contact in the heat pump thermostat. During heating, the outdoor coil is operating at a temperature below the outdoor temperature and condensation on the coil may take place. This condensation may then freeze onto the coil, reducing its heat transfer capacity.

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