According to Speaker Rich Hopkins, you can get audiences to respond if you:
- Respect them - make sure the responses you want to get are not embarrassing or hurtful to the audience and relateable to your topic
- Start soon - start early on in the speech with opportunities for the audience to participate in your speech with a response
- Encourage them - encourage the audience to respond and, when you get the response you want, praise the audience and encourage them to speak again
Tim Wilson
Professional Speech Coach
Free speaking tips at: http://speakingquicktips.blogspot.com