yeah, here i am..
with more details about my project.. as i said i am doing a project, we named as ultra sound.. try to make sound unidirectional..
we have two options
1) here we are mixing a sound of 1 khz with an ultrasonic wave of 40 khz to give out frequencies of 41 khz and 39 khz and we are using two ultrasonic transducers to emit these frequencies, and by using the beating phenomenon, we hope we can generate an audible frequency of 2 hz that is to be unidirectinal... and as we are suppossed to reproduce that 1 khz frequency signal we may use a frequency divider of factor 2 to divide that 1 khz signal giving .5hz.. and we can do the same process of mixing ... and get a beating frequency 1khz(f1-f2=40.5-39.5)
2) or else.. we may use another technique
i observed the beating sigals generated in the air have a similar pattern that of a DSB (double side band-suppressed carrier) modulated signal, so i think we can modulate these signals(39.5and 40.5) to give out a dsb signal of frequency components (f1-f2=1khz, and f1=f2=80khz).. and can use an ultrasonic transducer to emit tis signal and as the second frequency componet is of ultrasonic range we may not here it and i think the first frequency component(f1-f2 khz) can stimulate our ear, and this signal should be unidirectional.............
i await your opinion
The Best Ultrasound Project
Re: The Best Ultrasound Project
