<p>Someone asked a similar question in the openacoustics forum. See here:
<a href="https://www.openacousticdevices.info/support/configuration-support/audio-moth-sensitivity" rel="noreferrer">https://www.openacousticdevices.info/support/configuration-support/audio-moth-sensitivity</a></p>
<p>Apparently the different Audiomoth Versions use different MEMS microphones. AudioMoth 1.0.0 and 1.1.0 use the SPM0408LE5H - see datasheet <a href="https://media.digikey.com/pdf/Data%20Sheets/Knowles%20Acoustics%20PDFs/SPM0408LE5H-TB.pdf" rel="noreferrer">here</a></p>
<p>AudioMoth 1.2.0 uses the SPU0410LR5H - see datasheet <a href="https://media.digikey.com/pdf/Data%20Sheets/Knowles%20Acoustics%20PDFs/SPU0410LR5H-QB_RevH_3-27-13.pdf" rel="noreferrer">here</a></p>
<p>The sensitivity of the 1.1 is given with a typical value of -18 dBV/Pa and the sensitivity of the 1.2 is given with a typical value of -38 dBV/Pa. Both sensitivities are given for a reference condition of 94 dB SPL @ 1 kHz.  The linked datasheets also contain frequency response curves (normalized to 1 kHz) from 100 Hz to 10 kHz.</p>

CC BY-SA 4.0
2022-07-12T08:02:55.450Z
Hi @Fritjof, the sensitivity seems to be missing in the statement '...have a sensitivity of ...'  (only the reference SPL and frequency are given) - could you please fill it in?
Thejasvi
CC BY-SA 4.0
2022-07-12T09:16:41.847Z
Hi @Thejasvi Thanks for the heads-up. I have edited the answer.
Fritjof
CC BY-SA 4.0
2022-07-12T07:40:38.477Z
2022-07-12T09:15:36.243Z
2022-07-12T09:15:36.243Z
Fritjof
<p>How can I know the absolute sensitivity in V/Pa of AudioMoths (when used alone and also when used in the manufacturer's case) and its relation to the gain setting? A value measured at 1kHz or a full frequency response would be very useful.</p>
<p>I could't find the information on the manufacturers datasheet. In the AudioMoth Dev datasheet, I found the sensitivity of the MEM mic and the pre-amplifier gain but I'm not sure this applies for the regular AudioMoth.</p>
<p>I also found this very good work that tested all gain settings but it only gives relative levels between them: <a href="https://github.com/kitzeslab/audiomoth-performance/blob/main/report.md" rel="noreferrer">https://github.com/kitzeslab/audiomoth-performance/blob/main/report.md</a></p>
<p>Any other ressources?</p>

<measurement><hardware><audiomoth>
What is the AudioMoth absolute sensitivity in V/Pa?
# What is the AudioMoth absolute sensitivity in V/Pa?

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

How can I know the absolute sensitivity in V/Pa of AudioMoths (when used alone and also when used in the manufacturer's case) and its relation to the gain setting? A value measured at 1kHz or a full frequency response would be very useful.

I could't find the information on the manufacturers datasheet. In the AudioMoth Dev datasheet, I found the sensitivity of the MEM mic and the pre-amplifier gain but I'm not sure this applies for the regular AudioMoth.

I also found this very good work that tested all gain settings but it only gives relative levels between them: <https://github.com/kitzeslab/audiomoth-performance/blob/main/report.md>

Any other ressources?

**Tags:** measurement, hardware, audiomoth


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## 1 answers

### Answer by username_1 on 2022-07-12. Score: 6

Someone asked a similar question in the openacoustics forum. See here:
<https://www.openacousticdevices.info/support/configuration-support/audio-moth-sensitivity>

Apparently the different Audiomoth Versions use different MEMS microphones. AudioMoth 1.0.0 and 1.1.0 use the SPM0408LE5H - see datasheet [here](https://media.digikey.com/pdf/Data%20Sheets/Knowles%20Acoustics%20PDFs/SPM0408LE5H-TB.pdf)

AudioMoth 1.2.0 uses the SPU0410LR5H - see datasheet [here](https://media.digikey.com/pdf/Data%20Sheets/Knowles%20Acoustics%20PDFs/SPU0410LR5H-QB_RevH_3-27-13.pdf)

The sensitivity of the 1.1 is given with a typical value of -18 dBV/Pa and the sensitivity of the 1.2 is given with a typical value of -38 dBV/Pa. Both sensitivities are given for a reference condition of 94 dB SPL @ 1 kHz. The linked datasheets also contain frequency response curves (normalized to 1 kHz) from 100 Hz to 10 kHz.

> **Comments:**
> **username_2**: Hi @username_1, the sensitivity seems to be missing in the statement '...have a sensitivity of ...'  (only the reference SPL and frequency are given) - could you please fill it in?  
> **username_1**: Hi @username_2 Thanks for the heads-up. I have edited the answer.  

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