Effect on a voice

Hello everyone,

I am searching for an effect in Audacity for a voice, that can feel like the character is talking in a closed and very narrow space.
Here is an example of what I would like to have : https://we.tl/t-oxtK1eO3w1 (23 seconds extract).

The kid is first hidden under a hat, and the voice changes when he’s not under the hat anymore. I would like to have the effect when he’s under the hat (I’m making a remake of that film into a different language).

Do you see what I mean ?
Would it be just an Echo setting ?

Thanks in advance !

Low pass filter
suggested settings for under hat.png

Thanks it seems to work :slight_smile: