HYBRID REVERBERATION ALGORITHM USING TRUNCATED IMPULSE RESPONSE CONVOLUTION AND RECURSIVE FILTERING
Sean D. Browne · 2001
of a Master’s Research Project at the University of Miami. Research project supervised by Professor William Pirkle. No. of pages in text: 79 Artificial reverberation can be developed by convolving an input signal with the specific impulse response of an acoustic space. This computationally exhaustive method achieves superb reverberation, but is often abandoned for simpler filtering methods. Since it is only the length of the impulse response that determines the computational cost and resolution, a new hybrid algorithm is developed that borrows from the original impulse response easing the computational burden. A truncated impulse response can still convey the rich energy of the space while a digital filter bank can model the late echoes and reverberation tail. This more efficient algorithm will use a reduced length block convolution and recursive filter network to achieve similar high quality reverberation.