Respuesta :
Because of the phrase "as melodious as" I believe that the literary device used is a similie.
Answer:
The sentence contains an example of a simile.
Explanation:
A simile if a figure of speech that makes a comparison, showing similarities between two different things. It is a direct comparison because it makes use of the words "as" or "like".
A nightingale is a bird which is notorious because of its beautiful, loud song. The simile compares the lady's voice with the singing of the bird.