Let's take a closer look at why this statement is not true. Many accept this assumption only because the roof is made of metal. Surely you have heard the sound of rain on a metal roof while in a warehouse or similar industrial building. In such buildings, profiled metal roofs are used, which are attached to metal beams, which accumulate the sound of rain.
The installation of metal roofs for private houses is significantly different. Completely different types of metal roofing and installation methods are used for private houses. Specialists install a special insulating layer during operation, which also affects noise reduction. You do not have to worry about rain noise inside the house with this installation technology.