This acoustic hold open door release device is a wireless unit designed to keep fire doors open under normal use, without the need for door wedges or manual intervention. It listens for specific sound levels, activating when ambient noise or a fire alarm exceeds a certain decibel threshold.
On site, it is fitted to the base of a fire door, where it holds the door open for ease of movement in busy corridors or areas requiring regular access. When the fire alarm sounds, the device detects the noise and automatically releases the door after a short delay, ensuring safe closure without staff needing to act.
Sound-activated hold open function for improved accessibility
Automatically releases doors 14 seconds after high noise detection
Wireless design simplifies installation and avoids surface wiring
Assists in maintaining clear and safe escape routes
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