Treatment the Effects of Studio Wall Resonance and Coincidence Phenomena for Recording Noisy Speech Via FPGA Digital Filter

TL;DR

This paper presents an FPGA-based digital filtering method to improve sound insulation in recording studios by targeting wall resonance and coincidence phenomena, offering a cost-effective alternative to traditional acoustic treatments.

Contribution

It introduces a digital filter design using pole-zero placement to mitigate wall resonance effects, implemented on FPGA for real-time, high-performance audio processing.

Findings

Effective noise reduction at resonance and coincidence frequencies

Real-time FPGA implementation with high performance

Cost-effective alternative to acoustic treatments

Abstract

This work introduces an economic solution for the problems of sound insulation of recording studios. Sound insulation at wall resonance frequency is weak. Instead of acoustical treatment, a digital filter is used to eliminate the effects of wall resonance and coincidence phenomena on recording of speech. Sound insulation of studio is measured to calculate the wall resonance frequency and the coincidence frequency. Pole /zero placement technique is used to calculate the IIR filter coefficients. The digital filter is designed, simulated and implemented. The proposed system is used to treat these problems and it is shown to be effective in recording the noisy speech. In this work digital signal processing is used instead of the acoustic treatment to eliminate the effect of noise at the studio wall resonance. This technique is cheap and effective in canceling the noise at the desired frequencies. Field Programmable Gate Array (FPGA) is used for hardware implementation of the proposed filter structure which provides fast and cheap solution for processing real time audio signals. The implementation is carried out using Spartan chip from Xinlinx achieving higher performance than commercially available software solutions.