Questions tagged [decibels]

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4 votes
1 answer

Standardising spectrogram amplitude

I'm trying to plot the spectrogram of blast fishing sounds. The level of background sound is relatively similar across all recordings. When I plot files with bombs the background sound shows as quiet, ...
Fish and things's user avatar
5 votes
1 answer

Is it common to have a negative-positive dB range in underwater spectrograms?

I am using the "seewave" R package to plot spectrograms in R. Since my recordings were taken underwater, I specified as reference value 1 μPa. Here is my code: ...
Morgane's user avatar
  • 457
6 votes
1 answer

Can I convert dB(A) into dB?

Suppose I have a recorded sound, from which I can calculate a power spectrum, along with the Received Level of that sound measured in dB(A). Is there a realistic way to back-calculate the non-weighted ...
lframond's user avatar
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4 votes
1 answer

What are linear decibels (dBL) and how do they compare to standard dB SPL?

I'm reading through an EIS that has a blast monitoring section where blasts are characterized by Peak Pressure Level (PPL) measured in linear decibels (dBL). I cannot find a good definition of this ...
Megan Perra's user avatar
22 votes
1 answer

If I don't know the source level of an animal's vocalization, is there still a meaningful way to measure how loud the signal is?

I am working with a remote species, and as far as I am aware there is no data on source levels or an audiogram available. We placed the single recorder within a breeding area and have, at multiple ...
etgriffiths's user avatar
  • 3,618