You already have super-power in your eard, which you where not aware of. Steve Mould demonstrates in this video that you can hear without exercising, whether water is cold or warm. Test it yourself.
The reason is that you are already familiar with the sound of pouring water and have stored the information somewhere in your brain. This information is automatically retrieved if you hear the process but do not see it.
Hot water has a lower viscosity than cold. The blubber noise in warm water is slightly higher on average due to its lower viscosity. Our fine hearing sensors are clearly aware of this difference.
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