LRAD
1950XL
GENASYS INC.
Manual Part No.:114931-00 rev. B
16
5.4.6 Voice Boost Switch
The LRAD features a Voice Boost switch which gives the LRAD greater range and intelligibility
when broadcasting spoken voice recordings. When Voice Boost is ON, the total power level of
the voice broadcast is increased by a significant factor. The signal processing enabled by the
Voice Boost switch will also slightly distort the voice broadcast. This processing has shown to
improve the intelligibility of the LRAD over long distances.
Voice boost is not recommended for use with the Microphone as it will increase the sensitivity
of the Microphone and make the system prone to producing feedback. However, in some
installations, when the microphone is sufficiently distant and acoustically isolated from the
LRAD, the Voice Boost switch may be used. See the “Using the Microphone” section of this
manual for further information on feedback.
5.4.7 Microphone Clip
This clip is provided for attaching the microphone when not in use.
5.4.8 Sound Projection Switch
Enables high pass filtering to reduce the overall beam spread of the projected sound from the
LRAD. Select the narrow setting where nearby buildings or structures may cause
reverberations. This will ensure that the target hears the communication more clearly and will
reduce distortion caused by acoustic reflections from nearby structures. Select the wide setting
to broadcast with a wider coverage area in an open environment, such as the open ocean.
5.4.9 MIC/USB Input
The microphone input/USB connector is provided for connection with the handheld
microphone, an external audio device or for connecting to a USB enabled computer for the
purpose of downloading audio files.
The connector provided is of the following MIL-38999 Type III designation:
D38999/24KB35S
This connector provides thirteen #22 socket contacts. The following figure shows the pinout for
this connector:
Pin 1: +5.2 VDC Out (provides power to another LRAD MP3 Player for daisy-chaining).
Pin 2: Analog Audio Input
Pin 3: Analog Audio Input Signal -
Pin 4: Audio ground
Pin 5: Not used
Pin 6: Mic
Pin 7: Mic GND
Pin 8: Not used
Pin 9: Not used
Figure 5: Mic/USB Connector
Pinout
