I bought an Audio-Technica ATR-6550 Condenser Shotgun Microphone off eBay which works fine most of the time but sometimes picks up noise as heard in this recording. Can anyone identify the problem?
The noise you can hear is someone snoring. My advice would be to attend your local GP for assessment and possible treatment.
There's also a bit of static on the track, which is possibly due to a faulty capsule or excess humidity.