Oratorical (adjective) – of, relating to, or characteristic of an orator or oratory

Source: https://www.merriam-webster.com/dictionary/oratorical

“The feeling passed, escaped in the surprise of what Mrs. Hayes-Rore was saying. Her oratorical voice boomed above the city’s roar.”

It is now understood that Mrs. Hayes-Rore has a very distinguish and powerful voice. Her voice overcame the sounds from the streets of New York.