Patent Review: Ported Cavity Tweeter (opens in new tab)

This article focuses on one of two inventions by Alexander B. Ralph (Winter Garden, FL), listed as the sole inventor and owner. The patent is for a Ported Cavity Tweeter design, which also includes at least one acoustic duct extending through the face plate and diaphragm frame, configured as a Helmholtz resonator to increase the output level over a range of frequencies.