| 摘要 |
FIELD: measurement technology. SUBSTANCE: method of location of radio microphone and acoustic tube may be employed in measurement technology to detect unauthorized radio microphones connected to radio transmitter. Method is implemented by radiation of acoustic signal and reception of electromagnetic signal. Formed acute-angle directivity diagram has flat front, spatial scanning of acoustic signal is performed up to moment of reception of electromagnetic signal. Power of acoustic signal is sequentially decreased and direction of radiation of acoustic signal is changed before moment of reception of maximum electromagnetic signal. Location of radio microphone is found by direction of radiation of acoustic signal. Acoustic tube has tube and source of acoustic signal. Absorber of acoustic radiation is positioned by one end of tube. Length of tube from source of acoustic signal to its open end is chosen from expression 5d≅L≅24d, where d is diameter of tube, d d<λ, where l is length of wave of acoustic signal. Design of source of acoustic signals allows level of power of acoustic signal to be controlled. EFFECT: improved efficiency of method. 6 cl, 2 dwg |
