Ultrasonic USB microphones

The first fully digital ultrasonic USB microphone.

Ultramic1Ultramics are ultrasound microphones, with an integrated digital to analog converter. To record or to listen ultrasound you only need an Ultramic and a host device such as a Windows, Linux, Apple PC or a smartphone or tablet.

There are different version with different sampling rate:

Ultramic192K, Ultramic200K & Ultramic250K with 192 KHz, 200KHz and 250KHz respectively sampling rate.

The USB 2,0 Full speed port allows an easy connection to any PC or Mac computer. The device is recognized as a standard USB audio microphone, so no driver installation is required!
It appears as a single channel audio input device. However, if recording in stereo, the two channels will appear identical.


The MEMS (Micro Electro-Mechanical Systems) microphone is very sensitive, with a good signal/noise ratio and small form factor.


Connect it to your PC, iPhone, iPad, Android smartphone or tablet, and it will immediately be recognized as a new audio input.
In your preferred sound recording software, simply select the new audio input, and choose the sampling frequency. Table below for device compatibility.


Ultramic can be easily opened, via a screw on the back. There are two switches, near the front of the microphone, that can be turned on and off with a fingernail (no tools needed), to change amplification between the three hardware levels.

Operating system 192K 200K 250K 384K
Windows XP X not tested yet
Windows Vista
Windows 7
Windows 8 √ (1) √ (1) √ (1)
Windows 10 √ (1) √ (1) √ (1)
Linux Ubuntu
Android √ (2) √ (2) √ (2) √ (2)
Mac OS
iPhone – iPad  – iPod


1 – compatible with Goldwave and the default simple windows audio recorder

2 – check your device compatibility here:

List of compatible Android devices




SEA Wave














The default simple windows recorder


Ultrasonic recroder

Ultrasonic Recorder




USB audio testerUSB Audio Recorder


USB Audio Recorder



AudioFi – USB Audio RecorderAudioFi - USB Audio Recorder




USB Audio Recorder PROUSB Audio Recorder PRO



Audio Evolution Mobile StudioAudio Evolution Mobile DEMO


Audio Evolution Mobile Studio


List of compatible Android devices





Ultrasonic Analyzer


Please use the Lightning to USB Camera Adapter + a standard mini USB cable to connect Ultramic or Hydromic to your iOS device.



raspRaspberry project

Raspberry Pi Bat Projekt pdf (in German)


List of Bioacoustics Software



Ultramic connected to windows tablet

The ultramic has been developed with the scientific support of:

CIBRA / University of Pavia.


It can be used by scientific researchers for:

– Detection and recording of biological ultrasounds for bioacoustic
on insects, rodents and bats.
– Environmental studies to assess the impact of wind farms on bats.
– Recording and analyzing mouse ultrasonic vocalizations for
pharmacological studies.
– Detection of the high-frequency noises emitted by switching power
supply, by LCD screens, and also by the turbines of car and truck

In your home or in office: Discover the ultrasonic noise emitted by your TV, your computers, and by the power adapters of all your electronic devices.
Outside, use the UltraMic to record bat sounds! And discover the ultrasonic sounds of small rodents.


Amplification settings

Amplification levels, can be adjusted by turning down one of the two switches on the inner board.


Technical specifications

  • 192 K sampling per second. ULTRAMIC192K.
  • 200 K sampling per second. ULTRAMIC200K.
  • 250 K sampling per second. ULTRAMIC250K.
  • 384 K sampling per second. ULTRAMIC384K.
  • True 16 bit resolution.
  • Frequency range up to 96 KHz 100 KHz 125 KHz 192 KHz respectively.
  • MEMS high sensistivity Surface Mount Wide-band Ultrasonic Acoustic Sensor.
  • High quality, and low noise analog amplification.
  • USB device: Full speed port, with a mini USB B connector.
  • Dimensions: 130 mm long x 20 mm in diameter.
  • Weight 50 g.


Please keep in mind that ULTRAMIC250K doesn’t run on Windows XP!

User’s experience with Ultramics

Ultrasonic vocalizations predict acute and chronic D-amphetamine response in rats

Adaptive PPM Acoustic Detection in very Shallow Water Reservoir

Vocalization of Neonatal Rats

Harmonic and frequency modulated ultrasonic vocalizations

Studies on rats

Ultrasound in Dolphin


Development of a frequency-modulated ultrasonic sensor inspired by bat echolocation

Ultrasound in Lepidoptera

Ultrasound recordings of some Orthoptera from Sardinia (Italy)

High frequency components of the songs of two Cicadas

Ultrasound in orthoptera

Signal processing of acoustic impact response for reinforced concrete testing using paintballs and airsoft pellets for excitation

Estimating colony sizes of emerging bats using acoustic recordings

Ultramic250K + Raspberry

List of Bioacoustics Software

Bat detectors comparison





What do I need to record ultrasound of bats?

– Ultramic250k or Ultramic200K and

– A USB mini cable

– A recording device such as ONE of the following:

  • Windows PC
  • Mac PC
  • Android smartphone
  • iPhone, iPad or iPod
  • Raspberry

Which software can I use for my recordings?

Take a look at the top of the page!


Tips & Tricks

Why is there a bad SNR on my Ultramic recordings? 


In Windows OS the audio stream is resampled internally and digitally changed, this introduce a high gain and consequently higher noise.

To optimize the levels you must:


go to windows mixer



Mixer level


go to the Ultramic properties


Change the volume level to about 10

I do listen my voice!!! there’s something wrong!

Ultramics have no low pass filter so you can record at the same time ultrasound and audio.

At standard replay speed you can listen your voice and if you slow down the playback you can listen ultrasound!