During which decade did the true ascendancy of Active Noise Control arrive due to inexpensive DSP chips?
Answer
The 1980s.
The definitive breakthrough that allowed Active Noise Control to evolve from a fragile, frequency-specific analog curiosity into a robust, practical technology capable of addressing dynamic, everyday noise challenges occurred in the 1980s. This transformation was made possible by the commercial availability of inexpensive Digital Signal Processing (DSP) chips. These microprocessors finally provided the necessary computational power to implement complex, adaptive algorithms like the FXLMS algorithm in real-time. This digital capability allowed systems to constantly monitor the error signal and adjust the anti-noise output's amplitude and phase dynamically, which analog systems could not achieve effectively.
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