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Acoustic Hailing Devices (AHD) project intelligible speech out to extended ranges. A number of devices created by various manufacturers are in use throughout the Department of Defense. In addition to long range projection of speech for warning or instructional purposes, the devices are also capable of transmitting loud tones that can distract or deter personnel from approaching U.S. positions or vessels.
170111-F-VG904-018.JPG Photo By:

Mar 28, 2017
Unknown - Acoustic Hailing Devices (AHD) project intelligible speech out to extended ranges. A number of devices created by various manufacturers are in use throughout the Department of Defense. In addition to long range projection of speech for warning or instructional purposes, the devices are also capable of transmitting loud tones that can distract or deter personnel from approaching U.S. positions or vessels.


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