High Frequency Umsindo

Imisindo enemvamisa engu-20 kHz nangaphezulu ibizwa ngokuthi yi-ultrasound (noma umsindo we-ultrasonic). Umsindo wefrikhwensi ephezulu umsindo lapho imvamisa iphakathi kuka-8 no-20 kHz. Umsindo wefrikhwensi ephezulu onefrikhwensi engaphezu kuka-16 kHz awuzwakali, kodwa awuzwakali ngokuphelele. Umsindo wefrikhwensi ephezulu kanye ne-ultrasound endaweni yefrikhwensi ephansi (kufika ku-24 kHz) ingazwakala uma izinga lomsindo liphezulu ngokwanele. Umkhawulo womsindo (izinga lomsindo lapho umsindo ungazwakala khona) ukhuphuka kakhulu uma imvamisa (ngakho-ke, ithoni) iba phezulu. Abantu abasebancane bazwa kangcono umsindo we-high frequency futhi izinga lokuzwa kwabo likhulu ngokuya kumafrikhwensi aphezulu.