Because the sound energy (air compressions/rarefactions) can't escape from the pipe, while a lot of the sound energy can disperse sideways on its way there and back to a cliff. (You don't have to stand directly in front of someone to hear them speak).
That depends how close you measure to the fan. The closer - the louder! The distance is very important if you measure with a sound pressure level meter.
The decibel level of a rat depends on the measurig distance to the rat. The closer you are to the mouth of the rat the louder the noise you can measure will be.
Amplitude is a measure of the size of sound waves. It depends on the amount of energy that started the waves. Greater amplitude waves have more energy and greater intensity, so they sound louder. As sound waves travel farther from their source, the more spread out their energy becomes.
That depends how close you measure to the mouth speaker. The closer - the louder! The distance is very important if you measure with a sound pressure level meter. A conversation in 1 meter distance may have 60 decibels.
Sound does indeed get quieter through medium. The level of loss depends on the medium that is used, and as the square of the distance from source.
it becomes louder
Louder because you are more in closed so it echoes more.
No, reflecting sound will not make it louder. Reflection simply redirects the sound waves in different directions without amplifying them. Sound can appear louder when reflected if it reaches the listener from multiple directions, creating a perception of increased volume.
In my opinion, the 5.56 and 7.62x39 are very closwe in noise level, the 7.62 being a bit louder. The .308 is about 25% louder. Distance does not matter.
That depends on the distance to the vacuum cleaner. The closer, the louder.
Sounds are louder when they have greater intensity or amplitude, which is the magnitude of the sound wave. The more energy a sound wave has, the louder it will be. Additionally, the distance between the sound source and the listener can also affect how loud a sound appears.
Sound is not audibly louder in a room with the door open or closed. If I had a volume meter I might be able to measure the sound being slightly louder with it closed because the sound would reflect off a closed door but leave through an open one, but you'll never hear it. I determined this experimentally. First I closed the door to the room and played some Iron Maiden with my speakers turned up halfway. Then I opened the door to the room and played the same song at the same volume setting. It didn't get any quieter in there. The real effect, of course, is OUTSIDE the room. If I open the door and play Maiden, the neighbors hear it better than if I keep it closed and play them.
To our knowledge, the amplitude of the echo isn't used in the determination ofthe range to the target. The amplitude depends on the size, shape, and surfacecomposition of the target, so it's not a reliable indicator of the distance. The distanceis determined primarily by measuring the time delaybefore the echo returns to thesource of the sound.
The amplitude of a sound wave determines its loudness. A larger amplitude produces a louder sound, while a smaller amplitude produces a softer sound. The distance from the sound source also affects perceived loudness, as sound waves spread out and lose intensity over distance.
from a distance away why does a jet sound loader than a lawn mower
The decibels depends how close you measure to the harp. The closer - the louder! And the louder you play the more decibels you get. The distance is very important if you measure with a sound pressure level meter.
A drum kit is no decibels. The decibels depends how close you measure to the bat. The closer - the louder! And the louder you play the more decibels you get. The distance is very important if you measure with a sound pressure level meter.