Answers.Body: <p><a href="https://github.com/kitzeslab/audiomoth-performance/blob/main/report.md" rel="nofollow noreferrer">https://github.com/kitzeslab/audiomoth-performance/blob/main/report.md</a></p>
  <p>I was wondering the same and found this report.
  Researchers for the University of Pittsburgh have essentially measured sensitivity, directionality patterns and frequency response of Audiomoths with different casings and in different environments across a wide range of frequencies.  May it be of interest?</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-08-05T18:46:51.717Z
Answers.Text: Could you add a summary of this report and say how it responds the question please? Or just put it as a comment of the question ;-) .
Answers.UserDisplayName: Noil
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-07-06T15:25:42.047Z
Answers.LastActivityDate: 2022-08-12T12:22:50.743Z
Answers.LastEditDate: 2022-08-12T12:22:50.743Z
Answers.UserDisplayName: lframond
Answers.Body: <p>Though this doesn't fully answer your question, I would point you towards this recent publication, which examines the use of a <strong>hydromoth</strong> - an <em>audiomoth for underwater recordings</em>. It doesn't calibrate the device, but instead focuses on acoustic metrics (e.g. acoustic complexity indices) that can be obtained from an uncalibrated device.</p>
  <p>The abstract and intro read like a bit of a sales pitch, and don't really match the results section, which is where you should look to see a report on device performance. Some of it is worrying, including co-located devices recording different things (with one detecting/recording prominent dolphin sounds, and the other not, at the same time).</p>
  <ul>
  <li>Lamont, T.A.C., Chapuis, L., Williams, B., Dines, S., Gridley, T., Frainer, G., Fearey, J., Maulana, P.B., Prasetya, M.E., Jompa, J., Smith, D.J. and Simpson, S.D. (2022), HydroMoth: Testing a prototype low-cost acoustic recorder for aquatic environments. Remote Sens Ecol Conserv, 8: 362-378. <a href="https://doi.org/10.1002/rse2.249" rel="noreferrer">https://doi.org/10.1002/rse2.249</a></li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-07-01T13:10:19.803Z
Answers.LastActivityDate: 2022-07-01T13:10:19.803Z
Answers.UserDisplayName: Chloe
Body: <p>Has anyone shared their calibration of an <a href="https://www.openacousticdevices.info/audiomoth" rel="noreferrer">AudioMoth</a> automated sound recorder that has become popular as an inexpensive passive monitoring device with open-source firmware?</p>
  <p>The manual <a href="https://www.openacousticdevices.info/audio" rel="noreferrer">specifications of audio quality</a> include only the signal-to-noise ratio (SNR) at the one frequency of 1 kHz.</p>
  <p>Many users may thus wonder about the calibration of a range of frequencies, meaning the voltage level (or digital level) that will be logged when using this device's microphone to record a specific physical sound level (dB SPL) at specific frequencies.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-06-26T05:21:20.697Z
Comments.Text: It depends on the specifics of the microphone which varies across models slightly (the Audio Moth seems to come from China in batches and have mics added and then cases added - all by small independent businesses who each do things slightly differently) . Do you have the serial number on the internal mic (the hole size seems to make a bit of difference too), failing that the model and case manufacturer that houses the Audio Moth module?
Comments.UserDisplayName: Jiminy Cricket.
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-06-27T15:50:48.167Z
Comments.Text: They have been out of stock, but I am interested in getting some. Thanks for asking, @JiminyCricket
Comments.UserDisplayName: Chiricahua herpetologist
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-06-28T02:45:23.830Z
Comments.Text: All the audiomoth specs (plus technical info for the cases) are available on their site and/or in the user guide - https://www.openacousticdevices.info/audiomoth. These are the acoustic membranes that go across the hole in the 'official' case - https://groupgets.com/manufacturers/open-acoustic-devices/products/replacement-acoustic-membrane-for-audiomoth-case.
Comments.UserDisplayName: Carly Batist
Tags: <recording><automated-detection><calibration>
Title: Calibrate an AudioMoth automated sound recorder
ThreadText: # Calibrate an AudioMoth automated sound recorder
  
  (Asked by: username_0 on 2022-06-25)
  
  Has anyone shared their calibration of an [AudioMoth](https://www.openacousticdevices.info/audiomoth) automated sound recorder that has become popular as an inexpensive passive monitoring device with open-source firmware?
  
  The manual [specifications of audio quality](https://www.openacousticdevices.info/audio) include only the signal-to-noise ratio (SNR) at the one frequency of 1 kHz.
  
  Many users may thus wonder about the calibration of a range of frequencies, meaning the voltage level (or digital level) that will be logged when using this device's microphone to record a specific physical sound level (dB SPL) at specific frequencies.
  
  **Tags:** recording, automated-detection, calibration
  
  > **Comments:**
  > **username_1**: It depends on the specifics of the microphone which varies across models slightly (the Audio Moth seems to come from China in batches and have mics added and then cases added - all by small independent businesses who each do things slightly differently) . Do you have the serial number on the internal mic (the hole size seems to make a bit of difference too), failing that the model and case manufacturer that houses the Audio Moth module?  
  > **username_0**: They have been out of stock, but I am interested in getting some. Thanks for asking, @JiminyCricket  
  > **username_2**: All the audiomoth specs (plus technical info for the cases) are available on their site and/or in the user guide - https://www.openacousticdevices.info/audiomoth. These are the acoustic membranes that go across the hole in the 'official' case - https://groupgets.com/manufacturers/open-acoustic-devices/products/replacement-acoustic-membrane-for-audiomoth-case.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_3 on 2022-07-06. Score: 3 | Accepted answer
  
  <https://github.com/kitzeslab/audiomoth-performance/blob/main/report.md>
  
  I was wondering the same and found this report.
  Researchers for the University of Pittsburgh have essentially measured sensitivity, directionality patterns and frequency response of Audiomoths with different casings and in different environments across a wide range of frequencies. May it be of interest?
  
  > **Comments:**
  > **username_4**: Could you add a summary of this report and say how it responds the question please? Or just put it as a comment of the question ;-) .  
  
  ---
  
  ### Answer by username_5 on 2022-07-01. Score: 7
  
  Though this doesn't fully answer your question, I would point you towards this recent publication, which examines the use of a **hydromoth** - an *audiomoth for underwater recordings*. It doesn't calibrate the device, but instead focuses on acoustic metrics (e.g. acoustic complexity indices) that can be obtained from an uncalibrated device.
  
  The abstract and intro read like a bit of a sales pitch, and don't really match the results section, which is where you should look to see a report on device performance. Some of it is worrying, including co-located devices recording different things (with one detecting/recording prominent dolphin sounds, and the other not, at the same time).
  
  * Lamont, T.A.C., Chapuis, L., Williams, B., Dines, S., Gridley, T., Frainer, G., Fearey, J., Maulana, P.B., Prasetya, M.E., Jompa, J., Smith, D.J. and Simpson, S.D. (2022), HydroMoth: Testing a prototype low-cost acoustic recorder for aquatic environments. Remote Sens Ecol Conserv, 8: 362-378. <https://doi.org/10.1002/rse2.249>
  
  
  ---
  
  