DownloadsDownloadPre-processingTom BäckströmOkko RäsänenAbraham ZewoudiePablo Pérez ZarazagaLiisa KoivusaloSneha DasEsteban Gómez MelladoMariem Bouafif MansaliDaniel RamosMohammad Hassan ValiPre-emphasisNoise gate (Wikipedia)Dynamic Range Compression (Wikipedia)Voice activity detection (VAD)Vocal tract length normalizationSpeech enhancement