Support Forum

Public·982 members

All topics

Announcements (2)

Device (23)

Software (21)

SD Cards (8)

No Connection (7)

Calibration (2)

Recording Issues (14)

Triggers (4)

Enclosure (1)

USB Microphone (4)

22 hours ago

USB cable entry provision on the usb microphone case

Hi Folks,

I can't find anything describing the provision of a cable inlet on the usb microphone case. It seems that it must have such a thing, or else the case would be a bit useless! Can anyone help me find out what sort of size cable can be used with the case?

My intended application is for providing audio for a bird feeder stream that is currently coming from a USB camera mounted indoors, pointed out a window.

I'd like to see if I could use a flat USB cable to pass through the window frame to an audiomoth usb mic outside, then into a hub and onto a USB extension cable to the streaming encoder pc.

USB Microphone

44 Views

Alex Rogers

22 hours ago

Hi Zaphod,

The USB microphone case isn't fully waterproof - there is no seal on the housing and the switch, USB and 3.5 mm jack sockets are exposed. It's really intended for attended deployments whilst doing bat or hydrophone surveys.

Lots of people do deploy them anyway, and just seal up all the potential leak spots.

You could place the AudioMoth USB Microphone (or AudioMoth Dev or standard AudioMoth with a 3.5mm socket), into a regular waterproof enclosure, and use the the AudioMoth external microphone (https://www.openacousticdevices.info/product-page/audiomoth-external-microphone). This is fully waterproof with an acoustic vent and fits a 16 mm hole.

An (larger) alternative would be the AudioMoth Dev PCB in the AudioMoth Dev case, with a cable passing through the 16 mm vent hole in the base.

A fully-waterproof AudioMoth USB Microphone case is on the development list.

Alex

Edited

22 hours ago

Battery draw down when in USB/off mode?

I am wondering if anyone has specifics (other than minimal draw down) at the rate of draw down on batteries when units are in the USB/off mode? I am deploying 40 units in a couple weeks. They are going to be deployed in really remote areas, so we'd like to get as much as we can out of the batteries, but at the same time, I'd like to get all the units set up and not have to install the batteries in the field.

USB Microphone

48 Views

Andy

7 hours ago

This might be relevant. Once AudioMoth is initially configured the settings are persistent and only the time needs updating before subsequent deployments. If AudioMoth accidentally loses time during the trek to a deployment, you can then simply use the AudioMoth Chime App for smart phone to set the time in the field, this is really useful for maintenance visits and battery changes too.

February 18, 2026

USB Microphone with Android?

Does OAD have any plans to make the Audiomoth USB Microphone compatible with Android phones? I mistakenly purchased one thinking it could be used in the field as a better microphone than my phone's inbuilt one. Now I release it's only compatible with Mac, Windows and Linux - my fault for not reading the details. I bought it because I wanted something light and portable. Having to carry around a laptop to use it while hiking defeats this purpose.

I've tried some Android apps which can record with USB microphones but they don't detect it. I will try sell it if there's no plan for Android compatibility. Thanks,

Peter

USB Microphone

347 Views

petergreen2

Feb 18

Hi Alex,

Thanks for that. Bat Recorder is no longer available in Google Play, but the developer has kept it available on GitHub, and as an APK on his site:

https://www.digitalbiology.com/BatRecorder/

Installing the APK required editing permissions in Android, but all good now, the microphone is working fine.

For anyone with Android 11 or higher there is BatGizmo, which looks similar to Bat Recorder, but I wasn't able to try it.

Regards,

Peter

Edited

October 9, 2025

Device noise

Hi,

I'm using several AMs in USB mode, attached to mini PCs that are simultaneously recording video with scientific cameras. One AM and one camera per mini PC.

My issue is that, when the cameras are running, there's electronic noise that shows up in the 50-55 kHz range. This is a challenge because the noise is quite robust, and is right where some rodent USVs are that I'm collecting. This noise does not seem to be mechanical (doesn't change when I move the AM closer to or further from the camera, and also adding ferrite clips to all the wires has no effect), rather, it seems to be an issue of running the two devices out of the same computer.

Has anyone solved this before? I'm wondering if running the AMs off of independent power supplies would help - is this possible while still using the micro USB to record…

USB Microphone

242 Views

Edwin Houwertjes

Oct 12, 2025

I have experienced similar effects using microphones on a laptop computer and having te power supply attached. I had a battery that was good enough so ran from that to get a clean signal but I know there are USB filter boards on the market that could help but. You could try them on both the camera and microphone connection but also try an other power supply. If the loads increases on the power supply by adding the camera also the power supply can become more noisy. (and maybe even try a filter board on the power supply cable). If you want to tinker yourself, a small resistor (just a few ohms) in the powerline and a big electrolytic capacitor behind it over + and - would probably help a lot more than just a ferrite.