1. Vibration Occurrence

Rotary Machinery: Many mechanical equipment losses or bearing defects, often resulting from the rotation assembly of the equipment or its parts, can cause abnormal vibration, which frequently generates noise.

Impact: When an object is impacted, a significant amount of kinetic energy is converted into energy of vibration or noise in a short period. Additionally, the frequency distribution range is very broad for stamping, press machines, and forging equipment.

Resonance: Every system has a natural frequency, and if the excited frequency range overlaps with the natural frequency, it will produce a significant vibration noise, such as in engines and electric motors.

Friction: This noise is caused by the sliding phenomenon between the contacting and adhering surfaces. Common equipment includes cutting and grinding, etc.

       2. Generate Mobile Venues

Flow-induced aerodynamic noise, turbulence, jet flow, cavitation, gas cutting, and vortices phenomena.

When moving at high speed through a conduit or metallic surface, typical obstacles in the airflow within the conduit can cause turbulence, or encountering significant and rapid pressure changes can generate noise.

       3. Environmental Noise

Most general environmental noise originates from random noise sources, such as speeding vehicles, airplane horns, loud crowds, and various surrounding noise sources.

       4. Combustion Production

During the combustion process, phenomena such as explosions, exhaust emissions, and rising air currents generate disturbances in the surrounding air, all of which are accompanied by noise.

Engines, boilers, melting furnaces, turbines, and other combustion equipment all produce this type of noise.

      5. Miscellaneous Noise

In everyday life, household items such as air conditioners, speakers, inhalers, televisions, and more all produce sounds.