Split-Band De-Essing

This model implements split-band de-essing by separating a speech signal into high and low frequencies, applying dynamic range expansion to diminish the sibilant frequencies, and then remixing the channels.

De-essing is the process of diminishing sibilant sounds in an audio signal. Sibilance refers to the s, z, and sh sounds in speech, which can be disproportionately emphasized during recording. es sounds fall under the category of unvoiced speech with all consonants, and have a higher frequency than voiced speech.

To explore the model, tune the parameters of the Expander and Crossover Filter blocks. To switch between listening to the processed and unprocessed speech signal, double-click the Manual Switch block. To view the effect of the processing, double-click the Time Scope block.