The audiologists at Crystal Lake D47 specialize in identification and management of children with hearing loss and auditory processing deficits.  We collaborate with the family, school, speech pathologists and other professionals to facilitate understanding the child’s hearing loss and how the hearing loss impacts learning, communication and social development. We optimize the listening environment in the classroom through consultation, accommodations and technology.  We provide comprehensive evaluations as well as screenings for children from birth through 21 years of age including those with special needs.  


    Audiology Services:

    • Comprehensive evaluation for identification of hearing loss and management of children with hearing loss. 
    • Hearing screenings, monitoring as well as comprehensive audiological evaluations.
    • Experienced with children who have special needs.
    • Selection, verification and fitting of appropriate hearing technology for the classroom including hearing aids and FM/DM systems. 
    • Hearing Aid and Cochlear Implant assessments to verify benefit and identify additional support required to optimize the educational listening environment including the use of FM/DM systems.
    • Consultation with families, educators and other professionals to foster successful management of hearing loss and auditory deficits in school and at home.
    • FM/DM system inventory management and maintenance.
    • Loaner hearing aid bank and FM/DM inventory if needed for trials or repairs.
    • Expertise in hearing loss prevention and hearing conservation strategies.
    • Our audiologists have master’s and/or doctoral degrees in audiology and state licensure.


    As with all special education evaluations/services, there is no charge to parents for these services if they are recommended by the educational team as they are supported by the child’s local school district or Early Interventions.

    Referral Procedure:


    3 through 21 years: Parent should contact the administrator of their participating local school district, Special Education Coordinator or hearing itinerant teacher.


    Birth to 3 years: If receiving services through Child and Family Connections CFC#25, contact your case manager for a referral.  If the child lives in a member district but is not receiving Early Intervention services and lives in a member district, please contact your local school administrator for a referral.  

    Please contact the audiologists with questions.

    Rin Steinhoff, Au.D., CCC-A



    Mary Sue Heinzelmann, M.S., CCC-A