Problem
The camera's internal fan becomes audible during extended recording in a quiet room and contaminates dialogue captured by a nearby microphone.
Solution
Root Cause / Diagnostic:
Under continuous high-resolution recording, the camera's internal cooling fan ramps up to high RPM to dissipate processor heat. In a quiet, sound-treated room, the fan whine travels through air and is picked up by a nearby boom or desk microphone.
Actionable Fix:
1. Configure camera fan settings to 'Off during recording' or 'Low/Silent while recording' in the camera setup menu.
2. Increase the physical distance between the camera body and the recording microphone to at least 2 to 3 meters.
3. Record 15 seconds of silence with the camera running; inspect audio spectrum analyzer to verify zero fan harmonics between 2 kHz and 6 kHz.
Pro Tip:
Position an acoustic baffle or foam sound flag directly between the camera body and the microphone to block fan noise transmission line-of-sight.
Under continuous high-resolution recording, the camera's internal cooling fan ramps up to high RPM to dissipate processor heat. In a quiet, sound-treated room, the fan whine travels through air and is picked up by a nearby boom or desk microphone.
Actionable Fix:
1. Configure camera fan settings to 'Off during recording' or 'Low/Silent while recording' in the camera setup menu.
2. Increase the physical distance between the camera body and the recording microphone to at least 2 to 3 meters.
3. Record 15 seconds of silence with the camera running; inspect audio spectrum analyzer to verify zero fan harmonics between 2 kHz and 6 kHz.
Pro Tip:
Position an acoustic baffle or foam sound flag directly between the camera body and the microphone to block fan noise transmission line-of-sight.