Yes, there are sounds around us at different wavelengths that we cannot hear. The range of sound frequencies that humans can perceive is typically between 20 Hz and 20,000 Hz. This range is often referred to as the audible frequency range.
Sounds with frequencies below 20 Hz are called infrasound, and they are typically too low for humans to hear directly. However, some animals, such as elephants, can detect and communicate using infrasound.
On the other end of the spectrum, sounds with frequencies above 20,000 Hz are called ultrasound. Humans are generally unable to hear ultrasound because our hearing becomes less sensitive at higher frequencies. However, certain animals, such as bats and dolphins, are capable of hearing and using ultrasound for various purposes, including echolocation.
So, while there are sounds at different wavelengths around us, we are limited to perceiving only a specific range within the overall spectrum of sound.