Abstract: A separator for an electrochemical storage system, which is arrangeable between an anode and a cathode of the electrochemical storage system, is disclosed. The separator is formed from a semipermeable carrier material. The carrier material is formed from a fiberglass fleece where at least one surface side of the fiberglass fleece facing a cathode is modified in such a way that it is impermeable for an active material of the cathode. A method for the production of a separator is also disclosed.

Abstract: An improved ultrasonic lens and associated system is provided. Specifically, there is provided an ultrasonic lens with two sets of parallel sound ports operatively connected to an electrodynamic transducer to extend the working range of both audible and ultrasonic sound signals. The ultrasonic lens and electrodynamic transducer are situated so that the electrodynamic transducer axis and the sound port axes are aligned, whereby a shift in either the x or y axis direction will influence the ultrasound and audible behavior of the sound signal from the electrodynamic transducer.