Audio for surveillance is a complex topic with a lot of confusion and poorly implemented systems out there. We regularly get questions from users, such as:
- What kind of mic should I use?
- Where should it be mounted?
- How do I configure my system for best possible audio quality?
And finding the answers to these questions and others can be nearly impossible for those without an audio background.
So, in this guide, we aim to clear up the following topics:
Microphone types: Internal vs. external, mic vs. line level, mounting location, and directional vs. omnidirectional.
Sensitivity and range: Testing 3 cameras with internal microphones vs. a ceiling mount external units we bought from Louroe to see which perform best at distances up to 20'.
Audio configuration: Setting up the camera, client, and VMS for best performance.
Basic use: How to use your camera and VMS with audio inputs and outputs.
VMS considerations: Differences in operation, configuration, and export of audio from VMS systems.
Door intercom: How to configure a camera and VMS for use as a door intercom, one of the most common audio applications.
In this guide, we bought and tested two popular Louroe Electronics products, a ceiling mic with audio interface and a door intercom station: