G.R.A.S. Sound & Vibration
Sound-intensity Probe Type 50AI - Page 7
Fig. 1.6 Showing the markings and external features on the remote-control handles of the various
versions
of
the
Type
50AI
1.2
Available Versions
Various versions of the Type 50AI are available for direct use with a wide range of general-pur-
pose frequency analysers as well as specialised sound intensity analysers. Fig. 1.6 shows the
main external features of the various versions.
Type 50AI version B
Has built-in remote-control functions for direct connection to, and control of, sound-intensity
measuring systems from a wide range of suppliers such as 01dB, Müller-BBM and Neutrix-
Cortex.
Can be used directly with the G.R.A.S. Intensity Module Type 12AB (see also section 3.1),
which provides all necessary voltages for the remote-control functions and powering the pream-
plifiers.
The Intensity Module Type 12AB (which is battery-operated) has two standard BNC output
sockets for connecting to analysers that don’t have special microphone-preamplifier inputs and
a 9-pin D-sub socket wired up for connecting directly to the RS232 port of a computer (Fig. 3.2);
thus enabling software to be controlled by the remote control facilities of this version of the
Sound-intensity Probe.
Use with the Type 12AB enables direct use with 01dB Sound Intensity systems.
Type 50AI
version HP
Type 50AI
version C
Type 50AI
version B
version D
version LD
