yliäänähdyksiä

yliäänähdyksiä refers to a phenomenon where a sound or signal exceeds the upper limit of human hearing. Typically, the human ear can detect frequencies ranging from approximately 20 Hz to 20,000 Hz. Sounds with frequencies above this 20 kHz threshold are considered ultrasonic.

These high-frequency sounds are not audible to humans but can be produced by a variety of sources. For instance, many animals, such as dogs, bats, and dolphins, can hear and produce ultrasonic sounds. Devices like ultrasound machines used in medical imaging and sonar systems also operate within this frequency range. Certain industrial equipment and specialized speakers can also generate ultrasonic waves.

While inaudible to us, ultrasonic frequencies have numerous practical applications. They are employed in pest control devices, therapeutic treatments (like physical therapy), and in the cleaning of delicate instruments. Their ability to travel long distances and reflect off objects makes them useful for navigation and imaging. Research continues into further applications of this inaudible spectrum of sound.