DOPPLER EFFECT SOUND FORMING DEVICE

摘要

PURPOSE:To sharply change intervals in a short period of time by using two interval converters and smoothly switching the signal outputted from the 1st interval converter to the signal outputted from the 2nd interval converter. CONSTITUTION:The 1st interval converter 5 which changes the input signal to a higher or lower frequency fa by reading out the output of an A/D in the same sequence as the sequence of writing at the time interval faster or slower than the time interval of writing the above-mentioned output and the 2nd interval converter 9 which changes the output similarly to the frequency fb higher or lower than the frequency created by the 1st interval converter 5 as well as a D/A 11 which converts the output of a switch 10 for smoothly switching the signals to each other to an analog signal are provided. The signal added with the signal of the frequency fb decreased gradually in the amplitude and the signal increased gradually therein is outputted from the switch 10 at the time of switching. The interval converter can be changed from the signal of the frequency fa to the signal of the frequency fb in the shorter period of time in this way, by which the Doppler effect is obtd.