high-frequency sound waves

sound ranging (artillery sound ranging)

high-intensity sound

pulse repetition frequency (PRF) / pulse-repetition frequency

electromagnetic waves

kilometric waves

decametric waves

decimetric waves

ground waves

hectometric waves

long waves

metric waves

middle waves

Prandtl relation for normal shock waves

short waves

sky waves

space waves

diffraction task for electromagnetic waves

electric properties of object and propagation medium for electromagnetic waves

attack in waves

direction of waves, swells or seas

high frequency (HF)

high frequency direction finder

high frequency over-the-horizon (HF OTH) radar

high-frequency 'X-band' system

super high frequency weapon

high frequency transducer

very high-frequency omnidirectional range / omnirange (VOR)

ultra-high frequency

high frequency band

high frequency channel

high frequency communication system (HF)

high-frequency communication