The following table is completed but please correct me and explain why is incorrect to improve my undestanding. A sonographer increases the depth of view by a factor of two during an exam. Assume that the signal was sent through soft tissue both before and after the change. Would the following increase, decrease, or remain the same? EXTRA QUESTION: If I decrease the depth if view does it all stays the same?

pulse repetition frequency	decrease
pulse repetition period	increase
propagation speed	same
wavelenght	same
initial amplitude	same
frequency	same
pulse duration	same
spatial pulse lenght	same
duty cycle	decrease
period	remain

Indicate whether each term below is determined by the source, the medium, or both.

pulse repetition frequency	source
pulse repetition period	source
propagation speed	medium
wavelenght	both
initial amplitude	source
frequency	source
pulse duration	source
spatial pulse lenght	both
duty cycle	source
period	source