Unfilled bricks and soundproofing - looking for experiences

Hello,
we are planning to build our house with unfilled Unipor bricks. Since the property is located in a quiet area, we had no concerns regarding sound insulation until now. However, a construction company has advised me against it because the sound from inside would also be a problem.
Does anyone have a house made of unfilled bricks, if so, which bricks and what is the thermal insulation value? Are there any problems with sound insulation?
Thank you very much!

I don't have it myself, but many neighbors do. Totally unproblematic in my opinion. The prefabricated houses made of wood have more of a problem with that.

The sound from inside?
Are you afraid that the sound from inside will leak outside? What are you guys doing that is so "loud"?

Seriously:

A question of belief.
Mathematically, it is certainly not the best solution.
But a lot also depends on your perception. Some say, this is a single-family house, you live there with your family, why would you isolate yourself? Others say I want my peace and don't want to hear what the teenagers are up to.
But you probably won't use the same brick for the interior walls as for the exterior walls. The one for the exterior walls has to have a thermal insulation function. Therefore, a lot of air, many chambers, small webs, mathematically poorer sound insulation. For the interior walls, usually those with more mass are used. So less air, thicker webs, somewhat better sound insulation.
However, the weak points are often not the bricks but rather their processing, joints, etc. And especially doors.

Now a construction company has advised me against it, because the noise from inside would also be a problem.

Do they think that the rose bush in your garden will wither if you sing in the shower?

Thank you very much for your answers. I understood it to mean that the sound would spread from inside through the outer wall and therefore it would also be louder in other rooms. For example, I do not want to disturb the child while sleeping when we are watching TV. Or I want to work undisturbed in the home office when the child is screaming with joy in another room.

I understood it to mean that the sound would spread from the inside through the outer wall

Yes, but this happens because of sloppy component connections (such as wrongly placed edge insulation strips, etc.) and cannot be alleviated even by using top-performing wall stones. Construction errors cannot be corrected by using any material.