Manual - Scan&Listen device
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
I. The Scan&Listen device
The particle velocity is a scalar value that was never before audible as human ears are not
sensitive to it. The properties of such magnitude, the particle velocity, make it very suitable for
applications where the background noise and reflections have a high level.
The purpose of the setup, combined with a PU or a Scanning probe, is to easily detect and locate
sound sources, even in the most complicated noise environments.
1. Setup characteristics
a) Functionality
Scan and Listen is a double function device that allows:
Listening to pressure and particle velocity:
Acquisition and recording of both signals
The Microflown particle velocity sensor needs from the setup:
b) Powering
The Scan and Listen device provides power supply to the probe in order to make it functional and
sensitive. There are two modes of powering:
(1) Battery mode
S&L device works with 9V batteries which allow the powering of the probe. This is allows
portability of the system.
The amplification of the signal is then dependent on the battery charge.
The battery level is indicated by the switch color, if green, there is enough battery left to continue
using the battery. If red and blinking it needs to be connected to a power socket or battery needs
to be replaced with a new one.
(2) Powered mode
S&L can be directly connected to a power socket in order to obtain a constant current supply.
This mode is mostly recommended to be used for recording and analyzing the signal in a PC in
combination with a frontend.
c) Amplification
Differently to the Microflown signal conditioner, the S&L device is a simplified version, allowing
High gain operation.
NOTE: If Low gain amplification is needed, then a signal conditioner should be used.
