Frederick (Fred) Donald Waldhauer (1927–1993) was an American electrical engineer known for his work in hearing aids and combining art and technology.
Much of Waldhauer's career was focused on telephony and digital transmission, including work on T1 carrier systems.
In Waldhauer's latter years, at Bell Laboratories, his efforts focused on advanced hearing aid design and technology.
After retiring from Bell Laboratories, Waldhauer continuing work on hearing aid designs at what became Resound (acquired in October 2006 by GN (Great Northern) corporation).
Waldhauer's work on programmable multi-band compression at Bell Laboratories, and later at Resound, represented a fundamental shift in hearing aid design that still exists today.