I want to create an EQ or other approach that mimics a person inside an old style enclosed phone booth. Any thoughts? Thanks
Put the fictional measurements of a phone booth, say 100x100x250 cm, in one of those online room mode calculators
and recreate the highest peaks with eq. It will be only half-scientific, but at least you can analyse what such a room would really do with your sound.
You could try playing back and recording the sounds you require in a similar space, say, a wardrobe. Obviously you'd need to use a professional speaker and the original recording would need to be of sufficient quality to avoid introducing unwanted tones or noise. Assuming it's dialogue your mainly concerned with?