TL;DR The outer ear consists of an earflap and an approximately 2-cm long ear canal. The earflap provides protection for the middle ear in order to prevent damage to the eardrum. read more
Some birdsong have completely different modal arrangements providing ecstatic dimensions often pleasing to human ear and reflecting Gods' creative power!! The song of the birds can be compared to the early Arabic music (as both of them are in their basic modes) which is balmy to human ears. read more
The range of hearing in many species of birds is comparable with that of mankind. Having a greatest sensitivity between 2000 and 4000 hertz (cycles per second). This is partly why bird song is so useful in bird identification - it is easy for us to hear - and partly why we find bird song so pleasant. read more