Question

give an example of a object or source which produces both ultra and infra sonic sounds

Answer 1

Infrasonic , with low frequency : the very low bass in some rock shows, that feels like something hit ur chest. u can hear a boom at the same time since there is also a normal bass accompanying the infrasonic sound wave.it comes from a huge speaker.

Ultrasonic : dog whistles , the humans cant hear but dogs respond to since they can hear higher frequencies