The Lofitech Acoustic Deterrent Device (ADD) is the most effective means of deterring marine mammals.
The ADD consists of a control unit and transducer. The control unit contains a pulse generator and an amplifier to transmit random bursts of audio frequency signals to the transducer. This is transmitted at 191 dB/µPa/m at a frequency of between 10 and 20 kHz, which is optimal for deterring marine mammals without causing harm.
- Fish farm stock protection
- Fisheries catch protection