The Quiet Revolution: Restoring Sound with FIR Filtering

Name : Neel Patil  Mentors : Dr Kiran Talele and Dr Reena Kumbhare The First Encounter with Noise It began, as it often does, with a recording — a simple clip meant to capture clarity but instead filled with hiss and hum. The kind of sound that’s harmless to the ear yet endlessly irritating when all you want is silence. That interference sparked my curiosity one afternoon in the DSP lab. Could those unwanted ripples be wiped away without hurting the voice beneath? That question became the heart of my experiment: using digital filters to restore sound to its truest form. A Whisper Beneath the Distortion  Recording the clean signals felt like bottling stillness. Each pure tone — soft, rhythmic, almost breathing — became my reference, the x[n] of the experiment. To test my methods, I deliberately ruined it.  By introducing pink noise, I turned serenity into chaos. The once-clear waveforms became rough and jagged, forcing me to face what every engineer must face sooner or la...