07 Giant Sounding Plate
When a large, thin and flexible plate (e.g. plastic, metal or plexiglass) is bent, it may produce a loud and unusual howling sound. Explain and investigate this phenomenon.
  •  Vorführexperimente, Videos
  • Bendy Metal Make Funny Sound

    another demonstration video

  •  Wissenschaftliche Artikel
  • Geometric control of topological dynamics in a singing saw

    The common handsaw can be converted into a bowed musical instrument capable of producing exquisitely sustained notes when its blade is appropriately bent. Acoustic
    modes localized at an inflection point are known to underlie the saw’s sonorous quality. Here they uncover a topological basis for the existence of localized modes that relies on and is protected by spatial curvature. By combining experimental demonstrations, theory, and computation, they show how spatial variations in blade curvature control the localization of these trapped states, allowing the saw to function as a geometrically tunable high-quality oscillator.

  • Sound radiation of simply supported rectangular plate using finite element method

    Sound Radiation parameters like Sound Pressure Level, Sound Power Level and Sound Radiation efficiency of simply supported rectangular plate has been reported.

  • The free vibration of rectangular plates

    This work attempts to present comprehensive and accurate analytical results for the free vibration of rectangular plates. Twenty-one cases exist which involve the possible combinations of clamped, simply-supported, and free edge conditions. Accurate frequency parameters are presented for a range of aspect ratios for each case.

  • Theoretical Modelling of Sound Radiation from Plate

    In this study, the fundamental concept of sound pressure radiated from a simply-supported thin plate (SSP) was analyzed using the derivation of mathematical equations and numerical simulation of ANSYS®. The solution to mathematical equations of sound radiated from a SSP was visualized using MATLAB®. The responses of sound pressure level were measured at far field as well as near field in the frequency range of 0–200 Hz.

  • The Vibration of Rectangular Plates

    In this paper are considered the free transverse vibrations of rectangular plates with all possible boundary conditions obtained by combining free, freely-supported, and fixed edges. The Rayleigh method, assuming waveforms similar to those of beams, is used to derive a simple approximate frequency expression for all modes of vibration. For some boundary conditions it is possible to compare derived frequencies with those obtained by various methods of accurate analysis and by experiment; except for a few cases, the results from the approximate expression and accurate analysis agree closely.

  • Using sound in the very near field of vibrating plates for determination of their mechanical properties

    The authors do it the other way round: they use a scanning microphone in the near field to determine the mechanical properties of the vibrating plate.

  • Vibration of an elastic strip with varying curvature

    The vibrational behaviour of an elastic strip with varying curvature is investigated. Theory is developed which gives reasonable quantitive agreement with the observations.