Abstract: A speech aid for laryngectomy patients is described and comprises an electromechanical transformer with a power output stage connected upstream, a pulse generator for the production of a basic frequency, manually operated switches and electrical filters designed to vary the pulse frequency as a function of time. The power output stage in this respect comprises an electronic switch which is controlled by the basic frequency and a controlling pulse generator which switches the electronic switch off at least with temporal priority over the basic frequency.

Abstract: In a laryngeal speech aid apparatus comprising a sound head consisting of a clamped hard diaphragm capable of being set in vibration by a plunger, a driver in the form of a vibration coil connected with the plunger and associated fieldwise with a magnet assembly having a permanent magnet, a soft diaphragm connected to the plunger, and a generator-amplifier section connected electrically to the sound head for the production of periodic current pulses for the vibration coil, the improvement wherein (a) the permanent magnet of the magnet assembly consists of a permanent magnetic material designated by the formulaRECo.sub.