6. The watch of claim 1, wherein said spoken command analysing means comprises: means for converting spoken commands into an analog signal; means for filtering said analog signal in a plurality of band pass filters of different frequencies, to provide a plurality of filtered analog signals; means for sampling said filtered analog signal; and means for comparing each sample of each filtered signal to a threshold and for allocating to each sample a first digital value if said sample is of an amplitude which is greater than said threshold, and a second digital value in the opposite case, the whole of said digital values in respect of the samples associated with the same analog signal forming said binary representation of spoken commands.
6. The watch of claim 1, wherein said spoken command analysing means comprises: means for converting spoken commands into an analog signal; means for filtering said analog signal in a plurality of band pass filters of different frequencies, to provide a plurality of filtered analog signals; means for sampling said filtered analog signal; and means for comparing each sample of each filtered signal to a threshold and for allocating to each sample a first digital value if said sample is of an amplitude which is greater than said threshold, and a second digital value in the opposite case, the whole of said digital values in respect of the samples associated with the same analog signal forming said binary representation of spoken commands. 8. The watch of claim 6, comprising second processing means comprising means for sequentially comparing the digital value of each of the plurality of filtered signals at one sampling moment to the value of the filtered signals at the preceding sampling moment, means for producing a transition signal whenever the comparison means detect a difference, means for counting the number of sampling moments after the production of a transistion signal without a fresh transition signal appearing, and means for suppressing the samples of the filtered signals after said number has reached a predetermined value and until a fresh transition signal appears, the whole of the digital values of the conserved samples associated with the same analog signal forming said binary representation of spoken commands associated with the same signal forming said digital signal.