User's Manual

Introduction
Thank you for choosing the NL Camera. The NL Camera is a standalone system for acoustic
image measurements and signal analysis. As a standalone system, no additional equipment is
needed for basic usage of the device.
The NL Camera uses 124 microphones to form a very precise acoustic image in the desired
direction. This acoustic image is transposed in real-time on top of a digital camera picture, which
allows the user to accurately see from which directions sound is arriving to the camera. Interesting
sound sources can then be separated from background noise and saved for deeper analysis and
problem classification, using the NL Cloud service.
The NL Camera is a lot more sensitive and accurate than the human ear, which means that it can
locate both sound sources that are inaudible to the human ear, as well as sound sources that the
human ear cannot reliably locate. The NL Camera has a frequency range that extends to ultrasonic
frequencies, which is a huge benefit since many interesting problems and phenomena can be
located precisely using ultrasound.
Intended use of the device
The NL Camera is a tool for localizing sound sources and analyzing acoustic phenomena.
The NL Camera is not a measurement instrument for precise acoustic or other measurements. The
dB readings produced by the device are not guaranteed to correspond with absolute sound
pressure levels.
User safety
Follow all instructions. Please note that by using the device you agree to the terms of use. Misuse
might cause device damage or false sensor readings.
Use only the accessories that are provided with the NL Camera. Use only spare parts provided by
Noiseless Acoustics.
The heat sinks (8, 9 & 10) will become hot when the device is on or has been on. Beware of
touching them. Long term contact may cause burns.
Protect the camera lens and the microphone array from any kind of foreign objects, dust or liquids.
The NL Camera is not intended to be used while the battery is being charged. Charge the battery
only when disconnected from the NL Camera.
Charge the battery at temperatures between 0 °C and +40 °C (+32°F to +104°F)
Do not leave the charging battery unattended.