Fan noise produced by the cooling fans for the radiator, alternator, and others, become louder in proportion to their rpm.
The fan noise can be produced by fan blades cutting through the air, or by air (more…)
Noise
Transmission and prevention Vibration and Noise
Methods for preventing vibration or noise are as follows:
Removing the vibrating force
Stopping the resonance
Stopping the transmission
Preventing vibration and noise
etc.
Vibration or noise can (more…)
Method of Indicating Vibration, Sound, and Noise
Transmitting system
A vibration caused by a vibrating force and amplified by resonance causes the O-ring of the exhaust pipe and engine mounts to vibrate, transmitting a noise to the cabin. The passage (more…)
How are Vibration and Noise Transmitted
Basically, vibration and sound are transmitted in the same way. Let us take a look at the process of how a vibration is generated and transmitted to the human body as a vibration or a sound. Transmission (more…)
Wind Noise Symptoms And Malfunction Causes
This noise can be heard as airflow hissing in the window area. It occurs mostly at high speeds, and changes in the vehicle speed or in the direction of the wind alter this noise. Usually the volume of (more…)
Engine Noise Symptoms And Malfunction Causes
A relatively high-pitched noise is whining in the passenger compartment, increasing in volume with increases in engine rpm, when the vehicle is running at high speeds or under a heavy load.
1.Main causes
Mechanical (more…)
Body Beating Noise Symptoms And Malfunction Causes2
1.Torque converter slippage
(1)Noise caused by imbalance
If there is an imbalance in the pump impeller, and another behind the turbine runner, such as in the propeller shaft, each one of these components (more…)
Body Beating Noise Symptoms And Malfunction Causes
The volume (amplitude) of this noise alters cyclically, coming to you in waves. The frequency of the noise accelerates with the increase in vehicle speed. This noise occurs at certain engine and/or vehicle (more…)
Body Booming Noise Symptoms And Malfunction Causes
This type of noise is felt as a pressure in your ears, and its origin is often unknown to you. It increases in pitch (frequency) with the vehicle speed. It occurs within a relatively narrow vehicle speed (more…)
Tire Pattern Noise Symptoms And Malfunction Causes
This type of noise occurs often in vehicle with block-or lug-pattern tires when driving on paved roads. It increases in volume with the vehicle speed.
1.Main cause
Air-pumping effects of the tread pattern.
2.Mechanics (more…)