Abstract: The invention concerns a device (1) for the measurement of speeds and torques and for the simulation of driving conditions on a driven shaft (3) for a motor vehicle with a driveshaft (4) and at least one electrical machine (31), having a rotor (5) and a stator (6), whose rotor shaft (7) is mechanically connected with the driveshaft (4) and which is mechanically coupled via a detachable connection with the driven shaft (3) for the motor vehicle wheel so that they rotate together.

Abstract: A gas guide element with sound absorbent walls for blocking or damping noise spreading into main conduits, the gas guide element comprising a guide element body including a flexible sound absorbent inner hose resistant to mechanical, chemical and caloric load exerted by a gas to be guided; an outer hose; and a soft and flexible sound absorbent intermediate layer of material disposed between said sound absorbent inner and outer hose, said inner hose being composed of a flexible material and having an outer side provided with weighted metal elements, said sound absorbent intermediate layer being composed of a randomly oriented pile of materials, and said guide element body having a gas inlet and a gas outlet and at least one 360° convolution between said gas inlet and said gas outlet.

Abstract: A fluid guiding element for blocking and damping noises propagating in it has a main passage composed of a flexible inner hose jacket which is resistant to mechanical, chemical or calloric load by a fluid to be guided through the fluid guiding element, an outer hose jacket, and a material insert arranged between the hose jackets and composed of a flexible material which is resistant at least to calloric loads, the main passage having a fluid inlet and a fluid outlet and being provided with at least one turn of substantially 360 between the fluid inlet and the fluid outlet, and at least one auxiliary passage arranged in a cross-section of the main passage and having sound-soft walls, the at least one auxiliary passage being composed of an inner hose jacket, an outer hose jacket and a material insert arranged between the inner and outer hose jackets, the auxiliary passage being provided with at least one turn of substantially 360.degree..