That one doesn't sound "normal" it is too short a duration and sounds strangled, it should be about 5 or 6 evenly pitched squeaks like if you put a family of baby mice in a 50 Tonne press.
(No mice were harmed in the making of this answer)
Rob
Kun je wel ff een opname plaatsen van hoe die muizen dan exact klinken? :huh: :huh: :P
