Ultrasonic cigarette-holder or pipe stem

Cigarette-holder or pipe stem comprising an elongated body having an upstream end and a downstream end and containing an ultrasonic tobacco smoke treatment device comprising an elongated duct disposed eccentrically in relation to the longitudinal axis of the body having an inlet end to receive the products of tobacco combustion from the upstream end of said body and an outlet end to deliver treated products of combustion to the downstream end of the body, an ultrasonic vibration generator disposed in said duct to generate sound waves transverse to the direction of flow through the duct, said ultrasonic vibration generator comprising a piezoelectric ceramic element driven by an LED integrated circuit power oscillator, and a battery to energize said circuit, said ceramic element forming a portion of the wall of said duct.