Radiated　noise　severely　degrades　the　electrolarynx　(EL)　speech.　It　cannot　be　thoroughly　suppressed　by　conventional　frequency-domain　enhancement　methods.　In　this　paper,　a　new　method,　called　multiband　time-domain　amplitude　modulation　(MTAM),　is　proposed　to　reduce　the　radiated　noise　of　EL　speech.　In　the　proposed　method,　the　speech　components　changing　slowly　that　represent　the　radiated　noise　are　removed　by　directly　modulating　the　time-domain　amplitudes　in　multiple　frequency　bands.　The　EL　speech　enhanced　by　the　proposed　MTAM　and　the　conventional　frequency-domain　enhancement　methods　(spectral　subtraction　and　Wiener　filtering)　are　evaluated　on　both　acoustic　and　perceptual　characteristics.　The　acoustic　analysis　reveals　that　the　MTAM　not　only　can　reduce　the　radiated　noise　more　thoroughly　but　can　also　easily　control　the　residual　noise　intensity　by　adjusting　a　modulation　parameter..　Moreover,　the　MTAM　can　avoid　causing　new　artificial　noise　that　cannot　be　avoided　by　the　conventional　frequency-domain　enhancement　methods.　The　perceptual　analysis　indicates　that　the　MTAM　also　have　better　performance　on　increasing　the　acceptability　and　the　consonant　intelligibility　of　EL　speech　than　spectral　subtraction　and　Wiener　filtering.　These　findings　validate　that　the　MTAM　indeed　works　well　in　suppressing　the　radiated　noise　of　EL　speech　and　avoiding　the　artificial　noise.