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Subsequently, 17 representative markers in Huangqin decoction prepared with three types of peony root and their chemical characteristics and content distribution were carried out. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.Resonance occurs when the stiffness and mass elements of the ear are in balance and ear surgeries may change acoustic characteristics of the outer and middle ear. External ear canal resonance frequency (RF) can be dete