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Analysis of the Interaction between Ribbon Motor, Transformer, and Preamplifier and Its Application in Ribbon Microphone Design

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The transformer in a ribbon microphone interacts with the complex impedances of both the ribbon motor and the subsequent preamplifier. This paper presents a test setup that takes the influences of source and load impedances into account for predicting the amplitude and phase response of a specific ribbon microphone design in combination with different transformers. As a result, the effect of the transformer on the amplitude and phase response of the system can be simulated in good approximation by means of a generic low-impedance source. This allows for opti-mizing the ribbon/transformer/load circuit under laboratory conditions in order to achieve the desired microphone performance.

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Scott Dorsey
Scott Dorsey


Comment posted April 3, 2018 @ 16:23:27 UTC (Comment permalink)

This is really the first paper on the electrical and mechanical interactions within a ribbon microphones that doesn't just repeat Harry Olson's work.  The authors take a math model of the transformer and a math model of the ribbon and connect them together to show how the actual modulation of the load impedance by the transformer affects the ribbon behaviour.


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