Thank you everyone for the suggestions. I didn't realize that the replies do not echo to the whole list. Here are suggestions I got from people:
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20 kHz may be pushing it, but I have used the Knowles FG series. The attached data sheet shows the response rising towards 10 kHz, while another scan of an older datasheet shows the response to be a lot flatter.
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I would like to introduce you to the M2 binaural microphone by Feichter Audio. You can find all the information on the product's webpage: [http://feichter-audio.com/products/capturing/m2/](http://feichter-audio.com/products/capturing/m2/).
I invite you to visit the webpage in French, as the English version is not up to date. I apologize for the inconvenience.
Please don't hesitate to contact me if you need further information.
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Hi
For ready-to-use microphones, you can try Etymotic Research 7C probe mics available in the market [ER-7C Series B Microphone System Datasheet - Etymotic Research (yumpu.com)](https://www.yumpu.com/en/document/view/19543008/er-7c-series-b-microphone-system-datasheet-etymotic-research).
But I don't have personal experience with this model.
For my Ph.D. research, I use a pair of Knowles BEM-26783-P105 miniature microphones to capture Head Related Transfer Functions. I feel Knowles mics will meet your requirements, but you have to solder by yourself based on your needs.
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Hi Ajani,
We have used small hearing-aid electret microphones in the past - such as the Knowles EK23133. We pried off the port to flatten and improve the high-frequency response. We would just tuck them into the lateral ear canal - they're not too annoying.
It looks like the Knowles FG23329 or FG23629 is flat also. Both these are specified only 100-10,000 Hz, but it's easy to test their response at higher frequencies. The noise floor of the FGs may be slightly higher than the EKs (because they're smaller).
Both are available with leads attached through DigiKey for less than $50 each.
Knowles also has a wide line of MEMS microphones. I'm less familiar with those.
Other manufacturers such as Tibbets may have something appropriate.
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The Knowles FG series might work for your purposes ([https://www.knowles.com/series/dpt-microphones/subdpt-subminiature-microphones/series-fg-bfg](https://www.knowles.com/series/dpt-microphones/subdpt-subminiature-microphones/series-fg-bfg)). Although the nominal
frequency range is 100 to 10,000 Hz, it's used in animal experiments up to ~50 kHz since it's part of the EPL acoustic system design ([https://github.com/EPL-Engineering/epl_acoustic_system](https://github.com/EPL-Engineering/epl_acoustic_system)). It does
require calibration to be used outside the nominal range.
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Again, thank you all!
Best,
Ajani
On Oct 9, 2024 at 12:26 AM -0400, Ajani St Claver Stewart <ajani@xxxxxxx>, wrote:
Hello everyone,
I am seeking recommendations for small microphones suitable for in-ear binaural recordings. If you have experience with anything that performs well in this context or can suggest reliable manufacturers, I would appreciate suggestions.
Key requirements include:
Compact size to fit comfortably within the ear canal
Omnidirectional pickup pattern
Flat frequency response from about 20Hz to 20kHz
Wire lead termination
Thank you in advance for your suggestions!
Best,
Ajani Stewart