B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SEPARATING; MIXING
 B06
GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
 B06B
METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC OR ULTRASONIC FREQUENCY FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B 1/40, B23Q 17/12, B24B 31/06; measurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves G01H; in direction finding, locating, distance or velocity measuring G01S; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells sirens, whistles, G10K; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers H04R)  [2]