Many parrot rescues play music for the birds through out the day for enrichment. We can hear pop music, light rock, classical, New Age, and other mellow tunes. Many also do not allow heavy rock or heavy metal because the intense sounds may cause the birds undue stress. This may be true for many species. But this Umbrella cockatoo doesn't look stressed at all. He's a head banging U2 parrot. If you are a metal lover, you will love this.