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Subject: drum skin mode tech. The spacer creates an air gap between the transducer face and bottom membrane of the dosing chamber. It is believed that the interaction between the air gap and the film can cause the film to vibrate with a combination of modes. One mode resembles that of the transducer: a simple drum skin mode. Relative motion of the transducer and film in this mode compresses and expands the air, so that it acts like an axial spring. The other mode resembles a “ripple”; it has several wavelengths across the diameter of the film and can occur at a much larger amplitude than the drum skin mode.Как здесь перевести термин drum skin mode? Спасибо
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