In industrial product R&D, noise performance verification and third—party certification work, the acoustic condition of test environments largely shapes the reference value of measured data, and influences the progress of product noise—reduction iteration. Ordinary workshops and standard laboratories suffer from severe sound reflection from walls and ceilings. Mixed background noise and reverberated sound make it difficult to reproduce real—world noise behaviour for operating machinery and electronic devices.

As a widely—adopted acoustic laboratory facility, the semi—anechoic chamber features high—efficiency sound—absorbing wedges on four side walls and ceiling, while keeping a rigid reflective floor to create semi—free—field conditions. This configuration simulates real—life operating conditions where most industrial units rest upon hard ground surfaces. It works well for automotive components, household appliances, motors, pumps and fan assemblies. Engineers can carry out NVH validation for new—energy drive motors and gearboxes, noise measurement for refrigerators and air—conditioners, sound—power—level testing for blowers and servo equipment, as well as academic acoustic research for universities and metrology institutes. The construction complies with ISO 3745 and relevant local industrial requirements, covering background noise, free—field deviation and cut—off frequency to support CNAS—equivalent laboratory accreditation.

Many project owners compare semi—anechoic chambers against fully anechoic chambers in the planning phase. Fully anechoic spaces implement sound absorption on all six surfaces for full free—field measurement. By contrast, semi—anechoic chambers preserve floor reflection, fit ground—mounted test articles, and bring balanced capital expenditure and maintenance cost, making it a practical solution for industrial noise testing. Custom engineering covers floating vibration—isolation structure, sound—insulated enclosure, low—noise HVAC, load—bearing turntable and noise—treated service piping, preventing external airborne noise and structure—borne vibration interference. Whether for in—house corporate R&D labs or third—party test facilities, semi—anechoic chambers serve as key infrastructure for noise assessment, supporting product upgrading and global market certification, and helping reduce field complaints related to noise performance.