Questions tagged [attenuation]
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49 questions
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Looking for a formula to realistically model sound loudness at a given distance without "zero-distance infinities"
Context
This is something I am interested in as a game-dev experiment, to see if I can realistically simulate how sound attenuates in a 3d game space. So I am in no way an expert in the physics that ...
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Physical terminology for multiplying a wave by a negative number
In physics, given a function $f: \mathbb{R} \to \mathbb{R}$ representing some wave, if we multiply $f$ by a large positive number this might be called amplifying the wave, and if we multiply $f$ by a ...
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How to determine penetration depth of film using integral sphere setting UV-Vis data?
I am currently conducting research on polymer films and my current objective is to calculate the attenuation coefficient of the polymer film in order to determine its penetration depth.
Using an ...
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Why does electromagnetism attenuate so much faster than gravity?
Electromagnetism and gravity are both inverse distance-squared laws, so why is gravity affected so much less by distance?
Is it that electrical charges tend to pretty much completely balance out ...
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How to correctly calculate the signal strength loss of a ultrasonic sound?
So i am trying to calculate what is the amplitude of a received signal, if transmitted by a tranducer directly towards the surface of water body with a PVC plate laying underneath. The setup is shown ...
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Mass attenuation coefficient for sr90 beta radiation in water
I'm looking for either the mass attenuation coefficient or linear attenuation coefficient for sr90 beta radiation (or generally 0.546 MeV beta radiation - Yttrium decay and radiation can be ignored in ...
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Sound Attenuation and Loss Factor
I am currently trying to explain the reasons for my sound transmission loss for my material selection and design. I am using polymers of different depths and currently in my model I'm considering ...
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Determining the photon beam intensity to confirm the placment of an object in a iradiated chamber [closed]
A parallel bundle of monoenergetic photons is used for imaging in the configuration below. The bundle passes through a layer of water with a thickness of 1 cm, then through a zone where a cube with a ...
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Getting the spectrum of light source at high intensity (for low transmittance measurement)
I am trying to measure the transmittance spectrum through a liquid sample using a visible-NIR spectroscopy (a spectrometer connected to a fiber optics and a collimating lens at the end), with tungsten-...
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Calculation of Ultrasonic Attenuation Coefficient
Hello I have a conceptual question regarding calculating the ultrasonic attenuation coefficient for a transmitted wave within a solid material. I have seen Beer's Law used to calculate the attenuation ...
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Beer's Law ultrasound attenuation, account for spherical spreading?
I've seen Beer's Law for narrow beam written as:
$$
I = I_0 \cdot e^{-\alpha x}
$$
${\alpha }$ - attenuation coefficient (depends on absorption and scattering),
$I_0$ - initial intensity,
$I$ - ...
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How can we describe the attenuation of sound in an expanding gas cloud in a vacuum?
For example, suppose a spaceship explodes. The sound of the explosion will travel in the expanding cloud of escaping gas. I gather that it should rapidly weaken and the pitch should drop, but I'd like ...
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Does EM wave lose energy in air?
Light is EM wave.
As it travels through vacuum, it does not lose energy but I am wondering if it travels in air, just imagine light in your home. Before it reaches your eye, it has to travel through ...
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What is the formula for the power of a laser at distance $x$ (taking attenutation into account)?
While this is inspired by science fiction, if I have a hypothetical laser weapon that needs to meet a very high energy requirement of energies of the order $ 1 \times 10^{22} $ Joules, what formula ...
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Why does audio signal amplitude always fall off at higher frequencies?
In the frequency spectrum of every real audio sample that I've ever seen, the amplitude of the frequency components is always higher at low frequencies, then rapidly falls off at higher frequencies.
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