AES E-Library

Virtual Microphones: Using Ultrasonic Sound to Receive Audio Waves

A highly focussed ultrasound beam was sent through the room. At a distance of several meters the ultrasonic wave was received again with an ultrasonic microphone. The wave field of a common audio source was overlaid with the ultrasonic beam. It was found, that the phase shift of the received ultrasonic signal obtains the audio information of the overlaid field. So the ultrasonic beam itself acts as sound receiver, there is no technical device like membranes necessary at direct vicinity of sound reception. Because this kind of sound receiver is not visible or touchable we call it "Virtual Microphone".

Authors: Merkel, Tobias; Lühmann, Hans-G.; Ritter, Tom
Affiliations: Beuth Hochschule für Technik, Berlin, Germany; Lütronik Elektroakustik GmbH, Berlin, Germany(See document for exact affiliation information.)
AES Convention:132 (April 2012) Paper Number:8587 Import into BibTeX
Subject:Emerging Audio Technologies

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 132Papers)   /conv/132/8587.pdf

Start a discussion about this paper!