Acoustic Tags

Titley Scientific's acoustic tags allow researchers to:

• Conduct Fish Survival Studies
• Monitor Fish Migration/Passage/Trajectory
• Track Fish Behaviour in Two or Three Dimensions (2D or 3D)
• Measure Bypass Effectiveness at Dams and other Passages
• Observe Predator/Prey Dynamics and More

Acoustic Tags transmit a sound signal or “ping” that sends location information about the tagged fish to the hydrophone receiver.

Titley Scientific offer the T11, T14, T17 model tags.

The acoustic tag transmitter sends coded acoustic ‘pings’ at a frequency of 69kHz. Each ping can include telemetry data as well as the tags serial number, enabling fast and efficient processing.

Coding the acoustic pings increases battery life and the number of acoustic tag transmitters that can be used on a single frequency.

Expected Battery Life

Battery life for each tag size is entirely dependent on:

• Power output: the Acoustic Tags have a standard power output up to 150dB +- 3dB re 1uPa @ 1m. Tailored power output levels are available upon request
• Types of sensors included
• Time shelved: Tag life will be reduced if it is shelved for a long period of time. Transmitters should be activated within two months of delivery. For more information, contact us.
• Delay between transmissions (in seconds).
• The Acoustic Tags have six standard delays available with user-specified delays possible on request(see below).

Transmission rate varies randomly 45% about the nominal delay value. For example, a 90 second nominal delay indicates that the tag transmits randomly every 50 to 131 seconds.

Projected battery life is an estimate and users will experience a decrease in battery life if their tags are operating in extreme conditions.