Reducing comb filtering on different musical instruments using time delay estimation
Alice Clifford, Joshua D. Reiss · UWL Repository (University of West London) · 2011
Comb filtering occurs when a signal and a delayed version of the same signal are mixed, for example when the signals from two microphones reproducing a single audio source are summed. This effect can be reduced by applying a compensating delay so there is ultimately no delay between the audio signals. This can be made automatic by using time delay estimation. This paper explores the effect on the accuracy of the time delay estimation when using bandwidth limited source signals, such as a variety of musical instruments with different frequency content. It is found that the smaller the bandwidth of the source signal, the less accurate the time delay estimation and comb filter reduction. 1