<p>The easiest way is to ping them with a sweep (to get good time resolution) from a fixed location with respect to the hydrophones. We normally place a weak high frequency source at one of the hydrophones and have that ping at some interval.</p>
<p>Edit: good time resolution is obtained by matched filtering</p>

CC BY-SA 4.0
2022-07-14T07:11:25.623Z
2022-07-15T05:13:55.073Z
2022-07-15T05:13:55.073Z
Marinebioacoustics Aarhus Univ
<p>What methods are currently available to time synchronise acoustic recorders underwater automatically on a regular basis? I am looking to deploy a small 3-hydrophone triangular array of Soundtraps at roughly 2m spacing to locate baleen whales. However, the area is fairly remote so I am looking for a stand-alone solution to synchronise devices regularly while deployed. Deployment duration would be about 4-6 months.</p>

CC BY-SA 4.0
2022-07-18T07:48:20.153Z
Thanks I have edited the question with species and dimension of array information.
DeniseR
<synchronization>
Synchronisation of hydrophone arrays
# Synchronisation of hydrophone arrays

(Asked by: username_0 on 2022-07-11)

What methods are currently available to time synchronise acoustic recorders underwater automatically on a regular basis? I am looking to deploy a small 3-hydrophone triangular array of Soundtraps at roughly 2m spacing to locate baleen whales. However, the area is fairly remote so I am looking for a stand-alone solution to synchronise devices regularly while deployed. Deployment duration would be about 4-6 months.

**Tags:** synchronization

> **Comments:**
> **username_0**: Thanks I have edited the question with species and dimension of array information.  

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## 1 answers

### Answer by username_1 on 2022-07-14. Score: 6

The easiest way is to ping them with a sweep (to get good time resolution) from a fixed location with respect to the hydrophones. We normally place a weak high frequency source at one of the hydrophones and have that ping at some interval.

Edit: good time resolution is obtained by matched filtering


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