Can’t I just give my employees the HPD brochure and let them do it themselves?

While print and Web materials are useful, it has been shown that face to face tutorials—especially sessions where one-on-one instruction is employed.

Answer Extra: 

Numerous studies show that the most effective way to teach workers about correct hearing protection habits and usage is through one-on-one training.

source: Assessing Fit Effectiveness of Earplugs