This is Patsy at 5,000 feet over southern Pennsylvania. We did as you recommend: We put the muttmuffs on, and she promptly took them off. Then as we were doing the run-up prior to taking off, my wife put the muffs on and took them off so Patsy could see (hear) the difference. We put them back on, and she never took them off. Now, each flight, when we put them on she leaves them on for the duration. We fly a Cessna 182, tail number N182MM. Patsy loves the trips and loves the muttmuffs. Thank you very much! John, Carol and Patsy.