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AES E-Library

Automated (Microcontroller-Based) Impedance Tube

The acquisition of acoustic properties such as absorption and transmission-loss coefficients is necessary for the analysis and synthesis of acoustic materials. Because of its accuracy, the impedance tube is the preferred method of measurement. However, current implementations require a strong technical background in acoustics and considerable time to produce results. The system described in this work will use a microcontroller to automate the measurement process and expedite the delivery of information to a non-expert end-user.

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