Modifications of Surgical Suction Tip Geometry for Flow Optimisation: Influence on Suction-Induced Noise Pollution

Figure 4

Noise maps for all five suction head models. The standard model A is noisy at low flow rates (full spectrum), the new models 1 and 2 show highly significant lower noise, especially at frequencies above 300 Hz, the standard model B is in lower flow rates significant quieter than the standard model A (Fast Fourier Analysis as spectroscopy and spectrography during 5 sec, Hamming-window, 20 Hz-20 kHz, FFT Size 8192, Sequoia 14.1.0.157 DC2, 64 bit, Magix Software GmbH, Berlin, Germany), noise map legend see Figure 3.