A computer tower may make a surging noise rather than a constant humming noise if the case's screws are not properly tightened. Another reason for such a surging noise is the imminent failure of a fan.
The annoying humming sound of a swarm of bees.
humming noise is a bad ground to the radio. you may have a loose connection. connect a ground wire to frame of truck.
While rectification pulsations are caused due to ac not being converted to dc perfectly. This causes hum (low frequency humming noise). To smooth these pulsations filters are used. Noise is an unwanted signal in the communication system.
The air travels through the reed and that vibrates making noise and depending on what holes you have shut it makes a different noise.
A hummingbird
it could be your tires on the pavement.
id say type and size of tire, and if bearings are bad either or will make that humming sound.
you need a noise filter! go to your local stereo shop and tell em you need a noise filter.
I have heard that if you have papers or napkins in the glove compartment box they can get sucked into the air vent which then makes a humming noise that you can hear while driving and as you increase the speed the pitch of the noise gets louder.
its probably your radiator
the humming noise is coming from a bad ground on you stereo
Certain types of tires may cause a brief humming noise after your initial acceleration. The transmission may also cause a brief humming noise.
it does that because it has a generator which makes the engine makes these sounds
could be your wheel bearings
Not much info to go on but, it could be a wheel bearing going bad.
MAKE CAR MAKES THE SAME NOISE AND REPLACING THE PVC VALVE FIXED THE PROBLEM