Shower spouts are usually 60 - 70 inches above the tub floor.
6" above top lip of tub.
6'6" to 6'8" off floor for shower head.
It can if you put a tub underneath and possibly a spout on the shower control unit.
depending on your spout diverter if its a valve or is it on the spout it self, if the diverter is on the spout then your diverter is not letting full flow of water out of the spout and its putting enough pressure to allow the water out of the shower head, I had this problem before and if you change the spout it should fix the problem. If you have a 3 way valve which is on the wall then i would suggest replaceing the parts in that valve if possible other wise change out the divert valve. If your broke like me and want a cheap fix then put either a water flow resistor or a shutoff right before your shower head.
Replace the spout with one that has a place to attach the hose for the hand held.
Is more water comming out your tub spout? if so change spout
Either you don't have the knob pulled all the way, or the disc in the spout is faulty.
"Simmer the spout" means that you have to put a liquid into the pan.
Twelve inches from the top of the spout to the shower floor.
It will depend on the type of faucet if it is a three handle or has a popup in the spout popup in the spout will be the easiest to repair do so just by replacing with a new spout if it is a three handle you will have toremove the center handle and then remove the stem there will be a washer of some type replace the washer and put back together and try.
Your tub spout isn't fully diverting the water to the shower head and a very small amount is leaking through. The smaller the hole the water has to exit, the greater the pressure. Replace the tub spout, usually costs less than 20 dollars.
Employ a plumber.
if its just a shower and no tub spout then it most likely must be in your shower head and if its a hand held shower head (with a flexible hose attached) it most likely has a bad seal or some other way which allows air to get inside and drain the water out slowly. The same can be for a shower with a tub spout diverter and the shower head has a bad seal thus letting the water drain down the tub spout and it can be a real slow leak to cause the squeaking noise 20 minutes later, my guess of the squeaking noise would come from the air being pushed inside the shower head.
More "VOLUME" flowing from the tub spout then the shower head as the shower head has a flow restrictor