recognition mode m 2 using this arrangement of the apparatus and its operation the apparatus first hears the first voice command in m 1 mode secondly it inquires of the user a question by the issuance in m 2 mode of words which are synthesized in the apparatus and have contents closely related to the first voice command and thirdly again hears the second voice command in m 3 mode and confirms the relevancy of the contents of the second voice command with the first command thereby approving an accuracy of the first recognition and only thereafter the apparatus actually proceeds to switching on the heating apparatus or presets a selected heating sequence the preferred embodiment will be elucidated hereinafter referring to the attached drawings the mechanical structure of an example of the heating apparatus in accordance with the present invention is shown in fig1 and fig2 wherein an enclosure case 101 comprises a heating chamber 1 wherein an object 7 to be heated such as food is to be placed the heating chamber 1 has a door 2 with a handle 4 and mounted by hinges 3 to the enclosure case 101 the heating apparatus has a magnetron 5 which radiates microwave radiation into the heating chamber 1 and an electric heater 6 which produces resistive heat from commercial ac current the apparatus comprises a built in microphone 10 on an operation panel 9 and or a wire connected hand microphone 11 which constitutes an input end part of a voice command input means the panel 9 further comprises.