Huawei’s anechoic lab is located underground to ensure as quiet an environment as possible. The thick walls and mufflers in the ventilation ducts prevent outside noise from seeping in.
Human sound perception is not just reliant on the ear to pick up sound but is also affected by the structure of the human pinna, ear canal, and other body parts. When the sound enters the ear, it is processed in a number of ways, including refraction, diffraction, and inflection, before being sensed by the nerves of the brain. The brain then accurately determines the orientation, tone, and volume of the acoustics.
In order to accurately capture the impact of such processes on the sound acquisition, the anechoic chamber is equipped with specialized human head simulation recording equipment, which simulates the pinna and ear canal, and places two miniature omnidirectional microphones in the ear canal of the equipment (close to the eardrum) to reproduce all of the effects sound has on the human ear.
