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As the sound wave travels out from the source, the same amount of energy is covering a bigger and bigger area, so there is less energy per square inch. (In particular, less energy in the square inch reaching your eardrum.)
Imagine the energy as a lump of clay. When a sound wave is only 6 inches (15cm) from the source, the clay has to cover the *surface* of a radius 6in ball, and the clay can be clumped on pretty thick. But as the sound travels outward to 60in (= 5ft =~ 150cm), that same amount of clay now has to cover the surface of the much bigger ball, so it will have to be very thin.
Geometry tells us that the surface area of a sphere is proportional to the radius *squared*. This means that as you get twice as far away from a sound, only a *quarter* of the original energy reaches you. If you get ten times further away (like in the example above), then only a *hundredth* of the original energy reaches you.
[The human ear/brain is sensitive though; half the energy doesn't necessarily mean the brain interprets it as half as loud; the ear/brain has more of a logarithmic response: half the energy is like turning the volume knob down one notch; a sixteenth of the energy is like turning it down four notches. Decibels are units that measure the *logarithm* of the energy, which is why they are suitable units for talking about human hearing.]
What else can I help you with?
Why do sounds get quieter the further away you are from the source?
Louder or fainter means more intense or less intense of sound vibrations respectively.Intensity in turn is the energy per unit area.Imagine the source of sound to be at the centre of a sphere. When you are far away then the radius of the sphere would be larger and thus the surface area of the sphere also becomes larger.As the energy given out by the source of sound is divided by larger area to get the intensity its value becomes lesser. Hence fainter.Ear drums and microphone diaphragms are moved by sound pressure.Note: Sound power (sound intensity) is the cause - and the sound pressure is the effect. The effect is of particular interest to the sound engineer.Another Perspective:The intensity (loudness) of sound decreases with the square of the distance from the source.
Is 839719 closer to 830000 or 840000?
840,000 is closer as 281 away 830,000 is further 9,719 away
The 400 Keck reflector can see objects 100 fainter than the 40 Yerkes lens?
Its True.
Which depth cue accounts for why parallel lines appear to grow closer together the further away they are?
monocular constancy
How do the length and thickness of vocal chords affect the sounds you make?
The length and thickness of vocal cords significantly influence the pitch and quality of the sounds produced. Longer and thicker vocal cords typically generate lower-pitched sounds, as they vibrate more slowly. Conversely, shorter and thinner vocal cords produce higher-pitched sounds due to faster vibrations. Additionally, the tension and mass of the vocal cords can further modify the timbre and resonance of the voice.
Why do sounds grow fainter as you get further away from the sound source.?
Sounds grow fainter as you get further away from the sound source due to the dispersion of sound waves in the surrounding medium. As distance increases, the energy carried by the sound waves spreads out over a larger area, resulting in a decrease in sound intensity at the listener's location. This phenomenon is known as the inverse square law, where sound intensity decreases proportionally to the square of the distance from the source.
Why do echoes get fainter?
Echoes get fainter because each time the sound wave reflects off a surface, it loses some energy due to absorption, scattering, and dispersion. This energy loss causes the echo to decrease in intensity as it repeatedly bounces off surfaces and travels further away from the source.
What sounds scare mice away?
Most sounds will scare a mouse away. Loud sounds or bird sounds are two sounds that are great at scaring mice away.
When was Further Away created?
Further Away was created in 1996-10.
What what rhymes with painter?
fainter
How many times fainter would Venus look from 1 parsec away?
Venus has an apparent magnitude of around -4.4, meaning it would be 4.83 magnitudes fainter from a distance of 1 parsec away. Using the magnitude distance formula (brightness ratio = 2.512^(m1-m2)), Venus would appear approximately 122 times fainter from 1 parsec.
Will an electron feel a greater force when it is close to the nucleus or when it is further away?
further away :)
Can elephants make sounds heard 50 miles away?
can elephants make sounds herad from 50 miles away
What is the comparative form of faint?
fainter
Is sunlight fainter beyond Saturn?
yes
How far away can humans hear sounds?
Humans can typically hear sounds from about 20 feet away, depending on the volume and frequency of the sound.
Why does a noise sound fainter as you move away from its source?
Sound grows more faint as you move away from the source for two reasons: attenuation and diffusion. Sound energy attenuates as it passes through a medium, until eventually all the sound energy is lost to friction. So the further away you are from the source, the more the sound has attenuated before reaching you. . Diffusion occurs because the sound wave expands in all directions. Assuming no attenuation, the amount of acoustic energy striking any given surface area (your ear drum, for example) is inversely proportional to the square of the distance to the source, so as you move away from the sound, the amount of acoustic energy declines exponentially.
