what do blank faces mean?

The audience @ Science at the Summit, originally uploaded by mars_discovery_district.

Audiences have blank faces a lot of the time. Here is an audience listening - the description by the photographer is of a "rapt audience". They have blank faces. Its normal! We just get confused if we are speakers who don't understand that we need different skills when we are in front of an audience. Take a look at this film I made. It's only 56 seconds.

for more pics of blank faced audiences look at my flickr gallery blank faced audiences are normal

By the way if you have pics of audiences please send them to me as I have an interesting project up my sleeve.