The sounds getting as well low frequencies which can not be listened to by human ear are called infrasonic sounds (or just infrasonics). Rhinoceros can make infrasonic sounds having frequencies lower than 20 Hz. They may listen to infrasonic sounds. Straps is often connected inside the designated slots Found on https://trevoravpic.qowap.com/88270241/rumored-buzz-on-isolator-vibration-materials