Abstract: A head phone comprises at least one loudspeaker of the type that rests on the outside of a user's ears, mounted on and held in place by a support. The loud speakers are equipped with a sound-concentrating duct that may be pivotable relative to the auditory canal of a user's ear so as to facilitate insertion of the duct a short distance into the auditory canal.
Abstract: A mechano/electrical sensor senses force or vibration and delivers at least one electrical signal that is a function of the sensed force or vibration. The sensor has at least one inner body supported by at least one piece of electric support structure that, in turn, is suspended in a surrounding framework. Signal leads are provided from opposite lead polarizable sides of the at least one support structure.
Abstract: An electronic stethoscope including a microphone, amplifying equipment, and a loudspeaker for the user, also comprises an adjustable filter circuit. The filter circuit has a bandpass effect, and the center frequency and bandwidth of the passband can be adjusted at will throughout the audible range by the user.
Abstract: An erection aid comprises an elastic device adapted to be placed around at least a part of a penis, which device is in the form of a condom (1) or a tightening ring (10). The device is equipped with a piezoelectric unit (3), for example a piezoelectric foil, for emission of stimulating vibrations. The device is self-supplied with a battery (7) and an electronic miniature circuit (4) for activation of the piezo-unit (3).