Sound Ideas Crowds and Audience Reactions Sound Effects collections provide you with standing ovations, polite clapping, hecklers, rowdiness and Happy New Year countdowns. There are special sound effects with isolated children’s voices, as well as specific male voices or female voices featured in the effects. The Sound Ideas sound libraries include crowds of people in large, medium and small stadiums and theaters – registering panic, horror, disappointment and relief. To add to your production value, you may want also want to include individual human voices or voice Foley which are available in the Voice and Speech section.