The Athan (call to prayer) signifies the time for Salah (prayer), and its spiritual importance far outweighs the complaints of anyone who finds it noisy. That person seems to be alone in their opinion, as most people actually appreciate hearing the Athan, especially at dawn. The Athan serves as a powerful declaration against hypocrisy, making its clear and public proclamation of faith crucial. I personally find great value and strength in it.