I do not think so as diagnostic ultrasound works in the 1 to 40 MHz-region far away from the human hearing-region and I myself have never had nor heard about any hearing impression when using it. It is necessary to avoid reflection at the patient´s surface due to the huge difference of density (Impedanz) of air and water (the body). Therefore a gel of similar density as the body is used to bridge the distance between the transducer and the patient´s surface.

As I only refer to Prof. Leighton´s publication who himself did a lot of work for the safety of diagnostic Ultrasound you have better chances to find good answers adressing to him: Timothy G. Leighton, University of Southampton.

Thanks for your opinion back. Have a nice project.