<p>there was a
<a href="https://bioacoustics.stackexchange.com/questions/1227/how-to-automatically-ignore-sections-of-sound-files-crop-wav-files-before-proc">similar question on this SE</a></p>
<p>at least one of the answers gave a sample script (in R) to remove the initial couple of seconds</p>

CC BY-SA 4.0
2023-01-30T21:35:56.140Z
Thank you so much!
Melanie Smith
CC BY-SA 4.0
2023-01-30T19:57:50.000Z
2023-01-30T19:57:50.000Z
WMXZ
<p>I am currently doing soundscape analysis across three years. However, the data from one of the years has a hydrophone alarm while the other two years do not. As you can understand, this is a problem when I am trying to compare noise values.</p>
<p>Does anyone have recommendations on how I can remove the first 3 seconds from each file (about 1100 files)? I know Audacity has some trimming functions, but I am hoping for a way to do it in a batch (R, Sox-o-matic, or another program?). I would then also need to add 3 seconds to the name of the file (to reflect the new start time).</p>
<p>Thanks in advance!</p>
<p>Melanie Smith
UNH MS Student</p>

<soundscape><hydrophone><data-processing>
How to Remove Hydrophone Alarm from the First 3 Seconds of Every Recording
# How to Remove Hydrophone Alarm from the First 3 Seconds of Every Recording

(Asked by: username_0 on 2023-01-30)

I am currently doing soundscape analysis across three years. However, the data from one of the years has a hydrophone alarm while the other two years do not. As you can understand, this is a problem when I am trying to compare noise values.

Does anyone have recommendations on how I can remove the first 3 seconds from each file (about 1100 files)? I know Audacity has some trimming functions, but I am hoping for a way to do it in a batch (R, Sox-o-matic, or another program?). I would then also need to add 3 seconds to the name of the file (to reflect the new start time).

Thanks in advance!

username_0 username_0
UNH MS Student

**Tags:** soundscape, hydrophone, data-processing


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## 1 answers

### Answer by username_1 on 2023-01-30. Score: 5 | Accepted answer

there was a
[similar question on this SE](https://bioacoustics.stackexchange.com/questions/1227/how-to-automatically-ignore-sections-of-sound-files-crop-wav-files-before-proc)

at least one of the answers gave a sample script (in R) to remove the initial couple of seconds

> **Comments:**
> **username_0**: Thank you so much!  

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