Installing materials like "dynamat" sound denting insulation.
There is no sound if they are in good working order.
because the gears are grinding together if its an old car it will make a louder crack sound
The point of a car amplifier is the make music sound better, so in most cases all amplifier make music sound better.
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reduce waste, for example reduce loss of heat to surroundings, reduce sound produced so on so on
What is a "flapping sound" Birds?
Usually it'll be a grinding sound.
all u have to do is put some sugar in the gas tank, its an old trick to make your car sound more powerful than it is, i do it all the time
Car speakers might make a weird sound as the car accelerates if the radio is equipped with an automatic sound adjuster. Some newer car radios have this feature so that the radio volume does not have to be adjusted when a window is opened or a blower fan is running.
A car with a flat (dead) battery usually sounds dead - as in no sound. If you turn the key, trying to turn the engine on, chances are it will make no sound at all, or may make a sort of 'clicking' sound, or possibly a faint intermittent sound.
To reduce air friction.
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