Office Soundproofing Company, Building Acoustic Noise Reduction & Environmental Protection Unit, Air Conditioning Noise Control Enterprise

Based on our company's years of experience in similar engineering projects, when the air conditioning unit is operating normally, the noise level at the exhaust outlet exceeds 80 dB(A); the noise level about 1 meter away from the equipment is around 75 dB; after the equipment is turned on, the factory boundary noise level may exceed the standard.

After analysis, the noise generated by the air conditioning unit during operation mainly includes: aerodynamic noise at the exhaust outlet, compressor noise, mechanical noise from the unit itself, pipeline resonance noise caused by the equipment, motor noise, etc.

The air dynamic noise from the exhaust outlet and the compressor noise are the main sources of noise for the equipment. The noise at the exhaust outlet primarily consists of airflow noise, plus the noise from the high-speed rotation of the fan blades, forming the aerodynamic noise. Mechanical noise includes noise from bearing and structural vibrations caused by the unbalanced rotation of the motor rotor due to "groove harmonic forces." Electromagnetic noise is the noise transmitted outwardly, caused by the alternating electromagnetic attraction between the stator and rotor, as well as hysteresis expansion.

For noise-sensitive points affected by noise protection, the direct route of noise propagation is through the air.

There are primarily three methods for general noise control: reducing noise at the source, interrupting the path of noise transmission, and implementing protective measures at sensitive areas.