Sound on the video camera

Hello there, is there something different about the sound on the video camera please because today I can hardly hear EJ cheep and mostly just see her beak opening and closing. When there is an intruder about she does tend to be loud but I just can't hear her.  Even the little song birds have been drowned out.

I'm just not convinced it's the wind - it was horrendous yesterday but bird song and EJ could still be heard so I'd be grateful for a    'look see' into  it please. Thank you.