Acoustic Test Room

An acoustic test room serves a dual function: the outer shell attenuates external noise to create a low-background measurement environment, while the interior treatment controls reverberation to provide a diffuse or semi-diffuse field for repeatable production testing.

HEMU Acoustics acoustic test rooms are designed for end-of-line (EOL) production quality testing, where each manufactured product must pass a noise signature check before dispatch. The room provides consistent acoustic conditions shift-to-shift and line-to-line, enabling statistical process control for acoustic quality.

Background noise levels of NC-25 or lower are achievable, ensuring that even quiet products (< 40 dB(A)) can be measured with adequate signal-to-noise ratio. Reverberation time (T60) is tuned to the measurement standard — typically 0.4–0.8 s for ISO 3744 sound power determination, or 0.1–0.2 s for directional microphone measurements.

Automated test station provisions — including fixture mounting points, cable pass-throughs, robot arm access hatches, and PLC I/O connections — are integrated into the room design for seamless production line integration. Optional conveyor integration allows products to enter and exit the room on the production line without manual handling.