Two song types:
1 fee-bee
2 fee-b-be-be
fee-blitty
The two types can be song alone or in combination
the second is fee-b-be-be
………………………..
References:
Weeks Jr., H. P. (2020). Eastern Phoebe (Sayornis phoebe), version 1.0. In Birds of the World (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA.
Pieplow, Nathan (2017). Peterson Field Guide to Bird Sounds of Eastern North America. Houghton Mifflin Harcourt, Boston, MA.