If you have a clutch it could be slipping. It may also be a problem with the muffler or exhaust system. You may also have a very powerful engine.
Does the noise happen all the time you push on the gas pedal or only at certain speeds?
A vibrating brake pedal is an indication of a warped rotor. Noise is common to disk brakes but depending on the noise it can mean that the brake pads are worn out and you are due for a brake job.
When the turbo winds up it can make a whistling sound when a driver steps on the pedal. A loose part can also cause a rattling sound when the pedal is used.
Do you mean when you push the pedal " hard " you hear noise..........if so could be the ABS..........if not, then please have your brakes checked for safety.
Your brake booster is malfunctioning
ticking noise when the gas pedal is pressed in a 2005 ford ranger
an air leak in your intake will cause the engine to rattle. Protege's intake hoses are prone to cracking.
Depending on your car. On some cars you can do so by adjusting the gas pedal cable connection but I won't advise an ametuer to do that cause you might cause your gas pedal cable to be loose and that will cause big problems.
bad switch on brake pedal? do you have brake lights?
Try spraying the pedal linkage with wd40 or something similar and see if the noise goes away.
Check your catalytic converter.
You could be very low on oil, check your oil and add to the full line.