I am aware that this question is on the border of travel and aviation but nobody on the travel side of the fence seems to be able to answer it. Apologies if it is regarded as off-topic for this site.
The question and answers on Are cargo holds pressurised these days? provide some good info on pressure and temperature management in airliner cargo holds but none on noise management.
As part of the process of emigrating my wife and I will be taking our cats with us on an 11 hour flight. I have travelled the route regularly on both A380 and Boeing 747 services. My experience is that the passenger cabin of the A380 is significantly quieter.
Will the experience for the animals in the hold be similarly quieter, or is noise in the passenger cabin separately and specifically managed?