New Guide Examines Modular Fully Anechoic Chamber Design

A fully anechoic chamber treats all six interior surfaces—walls, floor and ceiling—with high-performance absorption wedges. The goal is to suppress sound reflections so that sound power level, sound intensity and abnormal-noise tests can be conducted in an environment that approximates free-field conditions.

Unlike conventional rooms built from concrete and plasterboard, the modular format uses metal panels combined with acoustic wedges. That construction allows the chamber to be assembled, reconfigured or moved while maintaining the controlled interior needed for repeatable measurements.

The chamber’s performance depends on the depth and configuration of its wedges, which are matched to different low-frequency cutoff requirements and room constraints. Thicker wedges generally extend absorption toward lower frequencies.

Three configurations are available. The T-250 uses 250 mm wedges, the HV02W uses 310 mm wedges and the T-500 uses 500 mm wedges; all three are paired with the 3TS65 isolation panel. Selection is guided by the frequency range of the intended measurements and the available interior space.

Supporting systems are designed to preserve the acoustic environment while keeping the room usable for extended test programs.

• Ventilation and noise reduction: an intake diffraction silencer, a sirocco fan and flexible silenced ducting maintain airflow while limiting operating noise.
• Acoustic optimization: a built-in EA acoustic filter reduces echo and improves the clarity of audio tests.
• Electrical and lighting: energy-saving LED lighting and 100V-3P-2 power outlets support a range of precision instruments.
• Monitoring and control: a centralized distribution panel manages power and provides secondary equipment wiring support.
• Structural performance: a single sound-insulated door with an internal absorbent layer blocks external noise, while the floor grating is rated to carry more than 200 kg.

The combination is intended to keep the interior acoustically stable without sacrificing the services needed for instrument-heavy test work.

The system is intended for acoustic evaluation of automotive components, precision electronics, nanotechnology products and environmental equipment. It supports analysis of sound power level, sound intensity and abnormal noise.

Using the inverse-square measurement method, the chamber can produce detailed performance assessment reports. That makes it suitable for laboratories that need to compare designs, verify specifications or investigate unwanted noise under controlled conditions.