90240Hz

90240Hz refers to a frequency of 90,240 Hertz. Hertz (Hz) is the unit of frequency, defined as one cycle per second. Therefore, 90240Hz represents a phenomenon that occurs 90,240 times every second. In the context of audio, this frequency is well beyond the range of human hearing. The typical human hearing range extends from approximately 20 Hz to 20,000 Hz. Frequencies above 20,000 Hz are classified as ultrasound. Thus, 90240Hz would be considered an extremely high-frequency ultrasound.

Such high frequencies are not typically used in standard audio playback systems due to their inaudibility to humans and the technical limitations of reproducing them. However, ultrasonic frequencies have various applications in scientific, medical, and industrial fields. These can include medical imaging (sonography), non-destructive testing of materials, sonar systems for navigation and detection, ultrasonic cleaning, and pest control devices. While the specific application of a 90240Hz signal is not inherently defined by the frequency alone, it would fall into the category of high-frequency ultrasound requiring specialized equipment for generation and detection. The designation "90240Hz" itself is a precise measurement of oscillatory cycles per second.