Because in park it doesn't use much gas, but in drive it uses more and this could be causing detonations due to valve timing or sticking. It could also be a cracked manifold or damaged gasket. Both can cause loud running noises.
It has a lover amplitude then louder sounds. (The wavelength doesn't change, but the hight of it shortens)
Sounds are louder when they are closer, because the sound is closer to your ears.
At night-time there are less sounds from traffic and people - therefore any sounds that are heard seem louder.
Dig a Hole
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.
A decibel is a measure of how loud a sound (any sound) is. 50 dB is about the sound level of gentle rainfall. Louder than a quiet room, softer than a quiet conversation. Not as loud as the dial tone on a telephone.
partly true. increases in the amplitude of a sound wave will generally make that sound wave sound louder, but sound volume is a least partly subjective. two different frequencies with the same mechanical amplitude might sound like they are at very different volume levels because of the way the ear and brain process sound information.
Sound devices are used to output sounds and music from your computer.
your voice sounds louder because of the echo on the class or plastic so it rings all through the room
Make what sound louder? Your engine? Fit a different exhaust system. with a bigger bore.
It makes the sounds louder So it amplifies (increases in size/volume/sound) of the audio
whistling in a high pitch voice. they also make quiet bubbling sounds