About Us Ear to Hear is a hearing aid center offering hearing aid fitting services and free hearing tests and Otoscopic exams. As an independent hearing aid dispensary, Ear to Hear is proud to serve the residents of Casa Grande for all of their hearing health needs. We are proud to offer our clients a variety of hearing aids in all styles and from the major hearing aid manufacturers. At Ear To Hear in Casa Grande, we offer hearing aids from the leading manufacturers including Signia (formerly Siemens), Widex, Resound, Phonak, Unitron, Starkey and more.