Patent ID: 7232417

Claim:
A device for assisting a patient in promoting the expectoration of secretions from the lungs, said device comprising: a main unit including: a microcontroller for generating digital electrical signals; a user interface for adjusting the frequency of said digital electrical signals; a Digital to Analog Converter for converting said digital electrical signals into analog signals an adjustable amplifier for amplifying said analog signals; a treatment interface operatively connected to the main unit, including: an acoustic transducer for converting said amplified analog signal into acoustic waves; and an acoustic coupling chamber coupled to said acoustic transducer, said acoustic coupling chamber creating an enclosed gap between said acoustic transducer and an overlaying skin surface of said patient when said treatment interface is applied to a chest cavity of said patient; wherein said digital electrical signals have a frequency located in a range of about 30 Hertz to about 120 Hertz and said analog signals have a power located in a range of about 10 Watts to about 50 Watts to efficiently promote the expectoration of secretions from the lungs of said patient.