"Subaudible" frequencies.
Ultrasonic frequencies.
Resonant frequencies (the Earth's resonant frequencies were first discovered by Nikola Tesla)
A standing wave can occur only at specific frequencies that are called natural frequencies.
gamma rays. they have the shortesst wawvelengths and the highest frequencies.
A spectrum.
It is called the spectrum.
sounds with frequencies greater than 20 khz are called 'Ultrasonic sound' or 'ultrasound'.
They are called conductors.
Sound waves with frequencies above the normal human range of hearing are called ultrasoundUltrasoundUltrasonic for frequencies higher than a human can hear, and infrasonic for those frequencies below the human threshold of hearing.
Sound waves with frequencies above the normal human range of hearing are called ultrasoundUltrasoundUltrasonic for frequencies higher than a human can hear, and infrasonic for those frequencies below the human threshold of hearing.
ultrasound