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Why does the sound wave decrease as the wave travels away from its source?
Wiki User
∙ 7y ago
Sound travels spherically from where it was made. If energy is to be conserved a sphere of an earlier point will have a higher flux density than one from a later point.
Yazmin Sawayn
Wiki User
∙ 7y agoTwo reasons.1) Some of the energy gets absorbed; the total energy of the sound decreases.
2) But mainly, the same power gets spread over a larger area, so there is less power per unit area. Ignoring point (1), the total power at a given distance remains the same, but the intensity - which is the power divided by unit area - gets less.
Wiki User
∙ 12y agoSound travels spherically from where it was made. If energy is to be conserved a sphere of an earlier point will have a higher flux density than one from a later point.
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Is it possible to move a source of sound relative to a stationary observer so that there is no shift in the frequency of the sound?
For the sound from a source not to be shift in frequency , the radial velocity of the source to the observer must be zero : that is the source must not be moving towards or away from the observer
Why does the fireworks sound come after a second of an explosion?
The explosion and the 'bang' happen at the same exact time !But the light from the burst has to travel to you before you can see it, and the sound of the burst has to travel to you before you can hear it.Light travels much faster than sound ... about 874,000 times faster ( ! ) ... so the light always reaches you before the sound does. You always see the burst before you hear it.The farther you are away from it, the farther the sound will lag behind the light, and the more time there will be between the sight and the sound. From one mile away, the sound reaches you about 5 seconds late.Rule of thumb for audio is 1 millisecond per foot, it takes about 30 ms delay (30 ft)before most humans can percieve the delay
Why do you see fireworks before hearing them?
We see the firework works first because the because burning emits light . It is a fact that it travels faster than sound . So the sound energy produced during the burning of fire work reaches us late . So we hear the sound after vizualizing it.
The sound wave is directed towards a cliff that is 680 meters away from the source of the sound An echo wave is heard 4 seconds after the wave is produced What is the period of the sound wave?
Not Your Personal Army
When a sound source approaches the pitch you hear is higher than when the source is not moving?
Yes. This is called a blue shift, and is caused by shortening of the period of waves. It's inverse is a red shift, which occurs when the observer is moving further away from the source of sound. These are both examples of Doppler Shifts.
Why does the loudness of a sound wave decrease as the wave travels away from it source?
The energy in the sound's vibration dies down, until it is no longer audible.
Why does the loudness of a sound wave decrease as the wave travels away from its source?
The energy in the sound's vibration dies down, until it is no longer audible.
How sound travels away from the source?
Sound travels in all directions. it will spread out.
How do vibrations produce sound?
A sound wave is a transfer of energy as it travels away from a vibrating source.
When the source of a sound is moving the sound waves spread out as it travels away from the listener As this happens what does the listener observe?
a lower-pitched sound
When you move away from an ionizing source of radiation does it increase or decrease?
When you move away from a source of anything, its effects decrease because it has a greater volume of space to occupy.
What phenomenon is the basis of police radar and makes light or sound waves increase in frequency if the source is moving toward the observer and decrease if the source is moving away?
Its called the doppler effect.
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 is the loss of a signals strength as it travels away from its source?
What signals? And it depends on the strength of the signal from the source
The loss of a signals strength as it travels away from its source is known as?
Attenuation
What do you call the occurrence of a sound getting louder as it approaches and quieter as it travels away?
It is called sound spreading. The sound wave is strongest at the source and the wave spreads out as it is farther away
What makes sound quieter?
Sound can be quieter if it travels a shorter distance, encounters more obstacles or barriers which absorb or dissipate the sound energy, or if the source of the sound is less powerful or further away from the listener. Additionally, using materials that absorb or dampen sound waves can also make the sound quieter.
