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Acoustics is the science of sound and of its effects on people. Condensation is a region in a sound wave in which the sound medium is denser than normal. Decibel (dB) is the unit used to measure the intensity of a sound. A 3,000-hertz tone of 0 dB is the softest sound that a no...
for the attenuation of unwanted noise, calculated from the sum of intensity over the frequency spectrum from 100Hz to 10kHz. As can be seen, even the most effective of these products achieves a reduction of only 1.5dB overall, while the least effective provide barely 0.6dB attenuation of ...
Astronomers (professional or amateur) can measure a star's brightness (the amount of light it puts out) by using aphotometerorcharge-coupled device(CCD) on the end of a telescope. If they know the star's brightness and the distance to the star, they can calculate the star's luminosity:...
of teamwork interact with one another and impact the emergence of team outcomes. Advances in the field of animal behavior have enabled a precise understanding of the behavioral mechanisms that enable groups to perform feats that surpass the capabilities of the individuals that comprise them. In this...
high-intensity burst of high-frequency radio waves. The burst might last a microsecond. The radar set then turns off its transmitter, turns on its receiver and listens for an echo. The radar set measures the time it takes for the echo to arrive, as well as the Doppler effect of the ec...
Here, the beam is being aligned through the centre of the Manual Intensity Controller. Using the half waveplate within the Manual Intensity Controller, the power of the laser beam is being attenuated. 5. Shutter the laser to avoid injury. ...
A decibel is a measure of sound intensity and amplitude using the decibel (dB) scale. The amplitude of a sound depends on its loudness. How do you calculate decibels? Calculate the logarithm of the power ratio, then multiple the outcome by 10 to identify the number of decibels. How many ...