Arrangement for transmitting and/or receiving an ultrasonic, wanted signal and ultrasonic, flow measuring device

An arrangement for transmitting and/or receiving an ultrasonic, wanted signal in a measured medium, comprising:

• an ultrasonic transducer;
• and
• a vibration decoupling element for securing said ultrasonic transducer in a containment, wherein:
• said vibration decoupling element or said ultrasonic transducer via a coupling surface issues ultrasonic, wanted signals toward a measured medium;
• and wherein said vibration decoupling element has a first interface, where said vibration decoupling element is connectable to the containment or to a sensor nozzle on the containment, which containment is partially or completely filled with measured medium;
• an amplitude of the wanted signal transmitted in the measured medium under reference conditions and in a frequency range of the wanted signal is more than 20 dB greater than an amplitude of a disturbance signal transferred via the first interface and via a wall of the containment;
• said vibration decoupling element has a platform for securing said vibration decoupling element to said sensor nozzle or to the containment and a second interface for securing said ultrasonic transducer;
• between said second interface for securing said ultrasonic transducer and said platform at least one vibration decoupling structural element is arranged, which vibration decoupling structural element is embodied as a solid body;
• and
• said vibration decoupling structural element is a sphere, ellipsoid, toroid or polyhedron.