A tapping noise might come into the engine because of heat damage to the lifters of the motor. You might also hear a tapping sound if the engine has been damaged due to a blown head gasket.
Low coolant and air in the heater core.
It is quiet obvious when you have a turbo because when you accelerate you hear a whistling sound. The turbo noise is unmistakable.
A tapping noise is generally the result of a bad hydraulic lifter, plugged oil passage to the lifter, or bad tappets. Sometimes just changing to lower viscosity high detergent oil will cure it. Or "Any automotive oil additive with the word MIRACLE in it".
The systolic pressure is measured at the first Karotkoff sound (stage I), it is the first tapping noise that you hear with a stethoscope when taking a manual blood pressure.
"Did you hear that noise?" -or- "Did you not hear that noise I just heard?"
It sounds like you are describing a condition known as pinging. That is the result, normally, of having the ignition timing too far advanced.
When you listen to a pencil tapping, the sound you hear is vibrations being transmitted through the air. As the pencil taps, it creates a disturbance in the air molecules, which in turn creates sound waves that travel through the air to your ears, allowing you to hear the tapping noise.
You are hearing a whirring when accelerating first to fourth because you are accelerating too fast and the whirring noise results. If you accelerate normally then you won't hear the whirring sound.
chances are good in your 1996 Chevy lumina if there is a slight tapping noise, check the oil. it may be low, or you may need to add a thicker additive. good luck!
Past: Heard (e.g. I heard a noise) Present: Hear/hears (e.g. I hear a noise, She hears a noise) Future: Will hear (e.g. I will hear a noise)
You would hear a faint tapping sound on the unmagnetized iron nail. As you move the stethoscope towards the strong magnet nail, the tapping sound would gradually become stronger and louder due to the attraction between the two magnetic objects, creating a more pronounced noise.