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Design of the LED fuzzificator for active noise cancellation systems

Balagurov A.V., Merzlyakova K.G., Zikov A.M., Tyurin A.P.


Preliminary quality assessment of the sound level with LED scale fuzzificator, embedded into active noise-canceling headphones, helps the user not only to fine-tune them to work, but also to monitor the sound level in the workplace. It becomes relevant to design a fuzzificator on the basis of electronic components. For this purpose the analysis is carried out for existing components with regard to their size, cost, and the possibility of creating a circuit with the minimum number of electronic components, in particular, a series of drivers LB1409, LB1412 and LM3916. The point indication of a signal with the possibility of substitution by a linear one is used in the basic scheme. Based on the technical documentation for the chip scheme, a scheme for measurement of the audio signal is developed, wherein 1 dB is taken as the unit of measurement; and simulation by the software signal source showed that the scheme is efficient and can be used as a measure of the noise level within active hearing protectors. Implementation of the fuzzificator device also allows to estimate the noise in real-time when developing the active noise cancellation devices in ventilation.


fuzzificator, active cancelation headset, electronic components, driver, design

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Copyright (c) 2016 Balagurov A.V., Merzlyakova K.G., Zikov A.M., Tyurin A.P.

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ISSN 1813-7911