I was testing the hearing of a sweet little 7 year old girl this week. She was within the soundbooth so I could hear her, but could not see her. I had been talking to her during the test, and was almost finished when I heard mutter “how do I breathe in here?”. The poor little thing thought that she might be running out of oxygen in my booth, but I was able to reassure her that fresh air was being delivered all the time!