Turbo trainers are not sociable machines. Your neighbours are likely to hate you if you wake them up every morning with the sound of yours. That’s why it’s worth looking for any indication of how loud the turbo trainer is going to be – although to get things proper silent, you’ll have to pay upwards of £400.
There’s also plenty of turbo trainer mats on the market, designed to dampen the noise from the machine. They also soak up your sweat, so you don’t slip comedically on your own perspiration after a hard session.
There are also trainer-specific tyres available for further noise-dampening, but these can prove time-consuming unless you have multiple bikes and don’t mind using one exclusively for indoor training over the course of the winter. There’s also a bit of disagreement over whether they actually make turbo training quieter or not (but they’re useful for other reasons).