PL410558A1 - Device for the demonstration of acoustic resonance phenomenon - Google Patents

Abstract

The device includes a rigid bar (1) with a handle (2) for holding or carrying the device. The strip (1) is a supporting structure of the device on which a rigid cylindrical tube (3) is mounted, attached to the strip (1) with clamps (4) in parallel with the gap. The rings (4) are attached to the bar (1) near its ends and transversely to it. Inside the pipe (3) a piston (5) is slidably mounted along it. Above the outlet of the pipe (3) above the piston (5) a short distance from the upper end of the pipe (3) there is a loudspeaker (12), under which inside this pipe (3) above the piston (5) a resonance chamber (13) is created, with whereby the loudspeaker (12) is electrically connected to the acoustic generator (16). The piston (5) is fixed at the upper end of the piston rod (9), which is slidably mounted from its lower end side in the handle (10) attached to the strip (1), and after determining the position of the piston (5) in the transparent tube (3) locked in this handle (10). The piston (5) is sealed and consists of a flexible felt central disc (6) of small thickness and diameter matched to the inner diameter of the pipe (3) and placed between the outer discs (7) of hard material, having a slightly smaller diameter than the diameter of the middle disc (6). The invention finds application especially for easy and quick presentation of the phenomenon of acoustic resonance individually in the laboratory, but also for a large group of listeners or viewers, for example at school or university.