I have hearing issues and am looking for a loud or louder doorbell. What's the loudest doorbell available?

Honeywell doorbell models are available up to 90Db. Because permanent hearing damage can occur at levels higher than 90Db, we recommend using several doorbells to cover larger homes. Here's a quick volume reference guide:
Series 9 Doorbells (RDWL917A) - 90Db
Series 5 Doorbells (RDWL515A) - 84Db
Series 3 Doorbells (RDWL313A and RDWL313P) - 84Db
Series 3 Doorbells (RDWL311A) - 80Db