Sound Locating Apparatus In Rescue Work

Following an air raid, casualties in bombed buildings could be trapped beneath the rubble. If they were able to make a tapping sound then the Rescue Squads could endeavour to find and extricate them. Heavy Rescue Squads would look to ensure the buildings had been rendered safe to enter (by shoring walls etc) and the Light Rescue would tunnel through to the casualties, carry them out and pass them onto the first aid posts or to a hospital.

To assist in locating buried casualties, a Sound Locating Apparatus was devised in early 1942 to assist the Rescue Squads. This consisted of a truck with a crew of three which would be called from its base located at Metropolitan Electric Supply Company in Uxbridge.

Called out by a Borough’s ARP Controller, the truck would arrive at the incident and set up various listening devices at a bombed building. The operator would require all other rescue work to cease for at least 10 minutes as they listened for any noise. From records, it appears not every rescue team was happy to stop their work to allow this.

The success of the Sound Locating Apparatus appears to have been quite limited. In some incidents, the locating apparatus could not be deployed for several reasons. In some cases, the Civil Defence rescue dogs had already suggested where a casualty had been buried (in one particular case, this turned out to be a buried cat). In quite a number of cases the results were negative, as no casualties were present.

A Ministry of Home Security report in January 1945, commented that the Sound Locating Apparatus “…cannot be regarded as a valuable aid to rescue work.”

​Thanks go to Chris Ransted for the information.

Sound Locating Apparatus truck

Sound Locating Apparatus operator

The "Pongophone" used to locate buried casualties