Oohs Flat Aahs Flat Too

An Experiment To Try At Home:

X - Oohs flat aahs flat too.
Y - What?
X - Oohs flat aahs flat too.
Y - I can't hear you.
X - Oohs flat aahs flat too.
Y - What did you say?
X - Oohs flat aahs too.
Y - I can't hear you.
X - Oohs flat aahs flat too.
Y - What?
X - Oohs flat aahs flat too.