sound attenuation definition
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Sound Attenuation: Definition & Effects No, your reception is fine. What you're experiencing is sound attenuation, the loss of energy from sound waves. Basically, attenuation is a damping of sound, an interruption that diminishes the volume and quality of the sound wave.
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Calculating the Maximum Attenuation for Optical Fiber Links Attenuation is a measure of the loss of signal strength or light power that occurs as light pulses propagate through a run of multimode or single-mode fiber. Measurements are typically defined in terms of decibels or dB/km. Wavelength. The most common peak wavelengths are 780 nm, 850 nm, 1310 nm, 1550 nm, and 1625 nm.
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Rarefaction Rarefaction, in the physics of sound, segment of one cycle of a longitudinal wave during its travel or motion, the other segment being compression.
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- Sound intensity or acoustic intensity (I) is defined as the sound power (Pac) per unit area (A). The usual context is the noise measurement of sound intensity in the air at a … listener's location as a sound energy quantity (measured in W/m²). Our eardrums and microphone diaphragms are moved by sound pressure deviations (p), which is a sound field quantity (measured in pascals Pa).
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Sound barrier The sound barrier or sonic barrier is a popular term for the sudden increase in aerodynamic drag and other effects experienced by an aircraft or other object when it approaches supersonic speed.
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attenuate Definition of attenuate. attenuated. attenuating. 1 : to lessen the amount, force, magnitude, or value of : weaken … shows great skill in the use of language to moderate or attenuate the impact of awkward facts. 3 : to make thin or slender Glass can be attenuated into fibers.
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Attenuation Attenuation in ultrasound is the reduction in amplitude of the ultrasound beam as a function of distance through the imaging medium. Accounting for attenuation effects in ultrasound is important because a reduced signal amplitude can affect the quality of the image produced.n engineering, attenuation is usually measured in units of decibels per unit length of medium (dB/cm, dB/km, etc.) and is represented by the attenuation coefficient of the medium in question.
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How do artists and venues make money from concerts? Typical artist revenue streams: Guarantee vs. percentage of show profit (ticket sales minus expenses) - most deals between artist and promoter call for a guarantee (minimum amount the artist will take home) versus (usually) 85% of the net profit of the show (ticket sales minus expenses).
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sounder 1 sound 1 (sound) n. Vibrations transmitted through an elastic material or a solid, liquid, or gas, with frequencies in the range of 20 to 20,000 hertz, capable of being detected by human organs of hearing. Transmitted vibrations of any frequency. A distinctive noise. v. sound·ed, sound·ing, sounds To auscultate.
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- Sound definition, the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. See more.
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Sound barrier Sound barrier, sharp rise in aerodynamic drag that occurs as an aircraft approaches the speed of sound and that was formerly an obstacle to supersonic flight. If an aircraft flies at somewhat less than sonic speed, the pressure waves (sound waves) it creates outspeed their sources and spread out ahead of it.
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Journal | Login. When the BBC Radio 4 programme Making History received an enquiry about Pickersgill Island, the producer Ivan Howlett turned to Ian Boreham for information. The resulting interview by the presenter, Sue Cook, was broadcast on Tuesday, 17 June 2003.
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- The total attenuation is defined as the sum of the attenuation due to geometric spreading A s {\displaystyle A_{s}} , the attenuation due to atmospheric absorption A a {\displaystyle A_{a}} , and the excess attenuation due to all other effects A e {\displaystyle A_{e}} , namely.
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- Attenuation also results from reflection and scattering of the ultrasound wave. The extent of reflection is determined by the difference in acoustic impedances of the two tissues at the interface (i.e., the degree of impedance mismatch). Acoustic impedance is the resistance of a tissue to the passage of ultrasound.
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sounder 1 The loudness of a sound perceived by the ear depends on the amplitude of the sound wave and is measured in decibels, while its pitch depends on its frequency, measured in hertz. The sensation produced in the organs of hearing by waves of this type. See Note at ultrasound.
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- Amplitude is the objective measurement of the degree of change (positive or negative) in atmospheric pressure (the compression and rarefaction of air molecules) caused by sound waves.
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Attenuation Definition - What does Attenuation mean? Attenuation is a telecommunications term that refers to a reduction in signal strength commonly occurring while transmitting analog or digital signals over long distances. Attenuation is historically measured in dB but it can also be measured in terms of voltage.
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Sound Waves A condensation is part of a sound wave where the density is higher than normal, while in a rarefaction the density is less than normal. Higher density means higher pressure, and lower density lower pressure.
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Noise Sound is measured based on the amplitude and frequency of a sound wave. Noise is most commonly discussed in terms of decibels (dB), the measure of loudness, or intensity of a sound; this measurement describes the amplitude of a sound wave.
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- The defined sound level is therefore not the perceived loudness of a sound. We get a rough approximation to human auditory perception by the use of an A-weighted filter, which approximates the sound signal in the different frequency areas according to the sensitivity of the hearing mechanism, but only at low levels.
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soundnoun sound noun (NOISE) A2 [ C or U ] something that you can hear or that can be heard: They could hear the sound of a bell tolling in the distance. She stood completely still, not making a sound. Suddenly we heard a loud knocking sound from the engine. Sound can travel over very large distances in water.
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Sound Intensity The usual context is the measurement of sound intensity in the air at a listener's location. The basic units are watts/m2 or watts/cm2 . Decibels measure the ratio of a given intensity I to the threshold of hearing intensity , so that this threshold takes the value 0 decibels (0 dB).
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Sound is a Pressure Wave A sound wave is a pressure wave; regions of high (compressions) and low pressure (rarefactions) are established as the result of the vibrations of the sound source. These compressions and rarefactions result because sound. a. is more dense than air and thus has more inertia, causing the bunching up of sound.
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Sound amplification by stimulated emission of radiation Sound amplification by stimulated emission of radiation. Sound amplification by stimulated emission of radiation (SASER) refers to a device that emits acoustic radiation. It focuses sound waves in a way that they can serve as accurate and high-speed carriers of information in many kinds of applications—similar to uses of laser light.
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- Sound Intensity (Loudness). Sound intensity, or loudness, is measured in decibels (dB). 1  A person with hearing within the normal range can hear sounds ranging from 0 to 140 dB. 2  A whisper is around 25 to 30 dB. 3  Conversations are usually 45 to 60 dB. 4  Sounds that are louder than 90 dB can be uncomfortable to hear.requency is measured in hertz (Hz). A person who has hearing within the normal range can hear sounds that have frequencies between 20 and 20,000 Hz. The most important sounds we hear every day are in the 250 to 6,000 Hz range. Speech includes a mix of low and high frequency sounds:
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Noise sensitivity Recruitment is a large increase in the sensation of loudness with only a slight increase in the actual intensity of a sound. Even though quiet sounds cannot be heard due to the presence of hearing loss, louder sounds may quickly become uncomfortable to the listener as they increase in volume.