SOUND GENERATOR

摘要

An apparatus includes a housing and a piezoelectric element coupled to the housing. The apparatus also includes an electromagnetic element coupled to the housing. The piezoelectric element is configured to convert first signals within a first frequency band into first sound waves by vibrating a first portion of the housing. The electromagnetic element is configured to convert second signals within a second frequency band into second sound waves by vibrating the first portion of the housing and a second portion of the housing.