tin earif someone has a tin ear, they do not have a natural ability to understand or enjoy music
[TahlilGaran] Dictionary of Contemporary English ▲
tin ear n. phr. 1. A lack of sensitivity to noise.
The construction noise doesn't bother Fred; he's got a tin ear. 2. A lack of musical ability; state of being tone deaf.
People with a tin ear make poor choir members. [TahlilGaran] English Idioms Dictionary ▲