Home‎ > ‎What We Do‎ > ‎Projects‎ > ‎*Dormant projects‎ > ‎

Ultrasonic Audio Recorder

Subscribe to changes of project pages

If you like what you see, don't just copy our technology, join SENSORICA. It is in your best interest! Here's why.


This microphone system records more than just ordinary sound. It also records extremely high frequencies that your ear could never hear.

When the recordings are played back at a very slow speed, these ultrasonic frequencies become audible - revealing sounds you never knew existed!

Most sound recorders have a sample rate of 44.1kHz. This one has a sample rate of 1MHz (over 20 times higher).


  • Combined with high-speed (slow-motion) video cameras: Add incredibly detailed sound. A drop of water might sound like a tidal wave. A glass breaking might sound like a building crumbling. Lots to be discovered.
  • Biologists could learn more about the communication sounds made by insects, rodents, and birds.
  • When used with real-time digital signal processing, could give new possibilities to sensor technology.

Short-term goals

- Find suitable components:
    - 1MHz 16-bit analog-to-digital converter
    - microphone that can respond to high ultrasonic freqencies
    - flash memory, several hundred megabytes at least
    - USB or some other connection

- Assemble a prototype

- Write a simple program to make it easier to locate sounds (based on amplitude level) in a long recording.

- Potential additional features
   - built-in lossy audio data compression
   - automatic start and stop of recording based on audio levels

Long-term goals

- Develop a compact stereo version
    - two microphones spaced a certain distance apart


[list important milestones]


[list members actively involved and all other stakeholders]
[This list will be replaced with a UI/script which will automatically pull info from the activity log, and display members
involved and their relative contribution. See infrastructure activity cluster for more on infrastructure development.]  


[make it clear how everyone involved will benefit]

See SENSORICA Business Model and Contribution Accounting System.

Tools, activities, and processes

The basic design of the electronic information flow is: microphone -> anti-aliasing filter -> analog-to-digital converter -> FIFO circular buffer -> flash memory

The flash memory could be a memory card or a USB stick. The data must be able to be retrieved later by a computer.

[provide information about technological tools use in this project, database, meeting places, ... Ex: folders in Google docs, Diigo link and tag used, project management, etc. ]

Skills and resources needed

[make it easy for outsiders to understand how they can contribute]

Contact us if you want to contribute!


Contribution accounting:
[enter the project into the contribution accounting system]

[decide where to store information about the project]
  • Create a folder with the name of this project under under SENSORICA/Projects
  • Create a folder with the name of this project under under SENSORICA/Literature
Knowledge base: 
Decide for tags to use in our Diigo knowledge base to refer to this project, write these tags on this page for everyone to know. See other projects for examples. 



[create announcements sub-page and embed it here]

you can add videos and picture albums here