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Zener Diode Noise Source
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Laser Diode Modulation and Noise $145.28 No Synopsis Available |
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Radio Noise Source $109.93 High Quality Content by WIKIPEDIA articles A radio noise source is a device that emits radio waves at a certain frequency, used to calibrate radio telescopes such that received data may be compared to a known value, as well as to find the focal point of a telescope soon after construction, so that the wave guide and front end may be properly located. Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturallyoccurring radio waves are produced by lightning, or by astronomical objects. Artificiallygenerated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, satellite communication, computer networks and innumerable other applications. Different frequencies of radio waves have different propagation characteristics in the Earths atmosphere; long waves may cover a part of the Earth very consistently, shorter waves can reflect off the ionosphere and travel around the world, and much shorter wavelengths bend or reflect very little and travel on a line of sight. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 180 Publication Date: 2010/08/21 Language: English Dimensions: 6.00 x 9.02 x 0.41 inches |
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Noise Control $54.86 High Quality Content by WIKIPEDIA articles Noise control is an active or passive means of reducing sound emissions, often incentivised by personal comfort, environmental considerations or legal compliance. Practical and efficient noise control is wholly reliant on an accurate diagnosis of what is causing the noise, which first involves finding the source of noise. Once the source of noise has been found, the focus is reducing the noise at source by engineering means. The most common noise sources can be divided into aerodynamic (fans, pneumatics, combustion, etc) and mechanical (impacts, friction, etc). Effective noise control focuses on reducing the noise from these sources as close to the source as possible. Noise control for aerodynamic sources include quiet air nozzles, pneumatic silencers and quiet fan technology. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 72 Publication Date: 2010/06/15 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches |
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Noise Pollution $39.99 Noise Pollution Giclee Print by Andrew Howat. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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The Noise $12.49 The Noise |
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Noise $4.99 Noise |
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Roadway Noise $87.62 High Quality Content by WIKIPEDIA articles Roadway noise is the collective sound energy emanating from motor vehicles. In the USA it contributes more to environmental noise exposure than any other noise source, and is constituted chiefly of engine, tire, aerodynamic and braking elements. In other Western countries as well as Lesser developed countries, roadway noise is expected to contribute a proportionately large share of the total societal noise pollution. Roadway noise began to be measured in a widespread manner in the 1960s, when computer modeling of this phenomenon was perfected. After passage of the National Environmental Policy Act and Noise Control Act, the demand for detailed analysis soared, and decision makers began to look to acoustical scientists for answers regarding the planning of new roadways and the design of noise mitigation. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 136 Publication Date: 2010/06/25 Language: English Dimensions: 5.98 x 9.01 x 0.31 inches |
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Study of Laser Diode and Edfa $111.53 This book basically gives the over view about The properties of erbiumdoped fiber amplifier (EDFA) such as gain and noise figure have been studied. By determining the characteristics of the 980nm, 1480nm 1550nm laser sources and ASE (amplified spontaneous emission) at the output of the amplifier used to determine the gain and noise figure of EDFA. This model allows to follow the signal (1550nm), pump (980nm) and ASE as they propagate along the fiber and determine population inversion .The both forward and backward propagation ASE are important in determining the overall gain and noise figure. For the amplification of more than 80 channels the DWDM (Dense Wavelength Division Multiplexing) has required CBand (15251565)nm and LBand (15651610)nm EDFA.We show that a flat gain spectrum can be achieved in the range from 1565 to 1610 nm when the EDF length, pump power and pump configuration are appropriately chosen. Special care must be taken when selecting the EDF length. Author: Kumar, Pankaj/ Kumar, Chakresh/ Chack, Devendra Binding Type: Paperback Number of Pages: 68 Publication Date: 2011/06/19 Language: English Dimensions: 9.02 x 5.98 x 0.16 inches |
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Duravit 0050200000 n/a 1930 1930 Series Noise Reducing Gasket for Wall Mounted Toilets 005020 $85 Noise Reduction Gasket for Wall-Mounted Toilets |
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Ambient Noise Level $92.4 High Quality Content by WIKIPEDIA articles In atmospheric sounding and noise pollution, ambient noise level (sometimes called background noise level, reference sound level, or room noise level) is the sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source. Ambient sound levels are often measured in order to map sound conditions over a spatial regime to understand their variation with locale. In this case the product of the investigation is a sound level contour map. Alternatively ambient noise levels may be measured to provide a reference point for analyzing an intrusive sound to a given environment. For example, sometimes aircraft noise is studied by measuring ambient sound without presence of any overflights, and then studying the noise addition by measurement or computer simulation of overflight events. Or roadway noise is measured as ambient sound, prior to introducing a hypothetical noise barrier intended to reduce that ambient noise level. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 128 Publication Date: 2010/09/15 Language: English Dimensions: 6.00 x 9.02 x 0.30 inches |
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Blocking Out Noise $24.99 Blocking Out Noise Photographic Print by H. Armstrong Roberts. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Make A Joyful Noise $39.99 Make A Joyful Noise Giclee Print by dana lee. Product size approximately 16 x 20 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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The Big Noise, 1944 $34.99 The Big Noise, 1944 Giclee Print by . Product size approximately 9 x 12 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Compucessory Noise Canceling Headphone $33.99 1 20 Hz 20 kHz 59224 Noise Canceling Headphone Battery Carry Pouch 3.5mm and 2.5mm L-Plug Power source is one AAA battery Foldable Extendable headband Foldable noise-canceling headphones are lightweight. Extendable headband offers long-wearing comfort. Travel-fold design maximizes compact portability. Headphones include an airline adapter for traveling. Power source is one AAA battery. Headphones offer a 30mm drive and 20-20Khz frequency response. Black Compucessory Headphone Noise Canceling Headphone www.compucessory.com |
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DIODE $12 When these electrical items fail there is little choice but to renew - With this genuine Suzuki par.. |
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Trees and Shrubs for Noise Abatement $58.7 The potential value of trees and shrubs, as determined from a study of a variety of shelterbelts and urban screen plantings in southeastern Nebraska, appears to be very good. Reductions of sound levels (attenuations) in the order of 5 to 8 decibels are common, and attenuations of 10 decibels (approximately half as loud) are not unusual for wide belts of tall, dense trees. When the difference in level is based on a comparison of treeshrubgrass combinations with hard surfaces, the worth of trees and shrubs is even more evident and attenuations of 8 to 12 decibels are common. Occasional reductions of 15 decibels or greater (1/3 as loud) have been noted but these are attributed to exceptionally advantageous temporary atmospheric conditions. The relative effects of tree species, height and belt width are discussed in some detail. In general, wide belts of tall trees are most effective. Species do not appear to differ greatly in their ability to reduce noise levels, provided deciduous varieties are in full leaf. Thus, evergreens are desirable for yearround noise screening. Relative placement of noise screens between sound source and protected area is of great importance; a screen placed relatively close to a noise source is more effective than one placed close to an area to be protected. Author: U. S. Forest Service, Forest Service/ Cook, David I./ Van Haverbeke, David F. Binding Type: Paperback Number of Pages: 84 Publication Date: 2004/11/01 Language: English Dimensions: 8.50 x 5.50 x 0.20 inches |
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Robot Car with Firing Gun and Noise $59.99 Robot Car with Firing Gun and Noise Wall Decal by . Product size approximately 24 x 32 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Noise generator
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