Alright, so I bought a kitchen thermometer with a 7” probe that can easily go through my urethra and here are the results that I got with IR (infra red) lamp and US (soundcare plus)
First, the IR lamp: (which I used for many sessions before I got the US)
T= temperature
0, 5, 10, 15 indicates time temp taken
Temperature in Fahrenheit as kitchen thermometer doesn’t support C.
IR lamp:
T0= 94
T5= 98
T10= 100
T15= 100
Notes: IR was held at aprox. 3-4 inches at first from target, then at 5-6 inches as the surface temperature of the skin was unbearably high. Not the case with the US.
Surprised to see only 100 was the max, since it feels insanely more hot than with the US. All this hot feeling is just my skin roasting though. Nothing being heated much inside.
Despite only getting to 100 I did obtain some gains when I was hanging so it is not a complete waste in my opinion
Cooldown:
T0= 100
T5= 98
T10= 97
T15= 96
T20= 95
T22= 94
Now for the ultrasound:
@ 3mhz 2.0cm^2 placing US ventrally (note that urethra is located ventrally, and I placed US ventrally, that is physically closest to where the tip of the thermometer would be)
T0= 94
T5= 103
T10= 107
T15= 110
Notes: I can reach 103 in just over 1 minute. Then depending on how fast you move the transducer, you can reach 105 and keep it there. 110 is very hard to attain and maintain at that level. The average temperature after 5minutes is 104-106 however.
Cooldown
T0= 110
T1= 100
T5= 100
T10= 96
T15=94
Notes: Cools down very fast from 110 to 100 in less than a minute
@ 3mhz 2.0cm^2 placing US dorsally (I wanted to test whether the temp would be the same if placed dorsally, that is the farthest from the urethra and from the tip of the thermometer)
T0= 91 (starting temp was lower since it started to rain and a cold breeze was flowing)
T5= 103
T10= 105
T13= 109
T15= 107
Notes: from t10 to t15 the temperature fluctuated, it wasn’t linear, that is because it’s a juggling act to keep the US moving, the shaft extended, enough US gel on, and writing down numbers, so naturally I can’t keep it straight 100% of the time, but the important thing is that 109 is the max I could get doing 100% of things right, and average temp was around 104-106. Another important note was that temperature was much more stable at 104 - 106 than when placed ventrally. When I placed the US ventrally, it was rather hard to keep a stable 105 average temp. However, dorsally it is much easier, but this could be because I had already undergone 15 min of US. Another guess is the wave propagates width wise at the end of the US spectrum, thus more wave area targets the tip of the thermometer, thus more stable. In contrast, placing it ventrally, the wave starts off as narrow as the area of the head of the transducer, so naturally there is much more area for error in placing the US as close as possible to the tip of the thermometer. Specially since the tip of the thermometer keeps sinking and moving around inside the urethra up and down as I used KY jelly to get it in there. Again, it’s quite a juggling act
Cooldown
T0= 107
T1= 100
T5= 97
T10= 96 (stopped here just for time sake, and the same as ventrally pretty much)
@ 1mhz 2.0cm^2 dorsally
T0= 93
T1= 97-98
T5= 103
T10= 105-106
T15= 104-108
Notes: By far my preferred setting as with the 3MHZ sometimes it can get too intense, it hurts, and sometimes pain does not equal temperature rising. Most stable setting to stay around 104-106.
Other observations:
I tried @ 1mhz 1.6cm^2 dorsally to see how as a proxy the US pro would fare since it is only $200 but the max temp I could get was 103. I held it for quite a while and it seemed to not budge past that. I didn’t test conclusively though since I had already spent so much time testing, about 2-3 hours of having a probe stuck up my urethra
Making sure the transducer area is in full contact with skin, that is 100% of the area, and pressing it harder than softer against the shaft, produces faster and greater temperature stability.
Not sure about the amount of gel but at times it seemed more gel was required when temp would start to slide down, and once reapplied it was easier to get back up to temperature.
Temperature fluctuates A LOT. As you can see in just 1 minute the temp goes back to 100. However, once you’ve reached 105 or more, and you remove the transducer, the temp goes down to say 102-103 but then upon reapplication of transducer, it takes about 5-10 seconds to reach 105 again.
Even at 110 the temperature of the skin is quite ambient, but one can feel as though whole shaft is a hot rod inside. 110 is completely bearable, but very hard to attain.
1 vs 3 mhz doesn’t seem to make much difference. What makes the difference is the intensity setting e.g. 2.0cm^2 power. As long as it’s at this setting the temperature can reach 103 to 109 easily in about 10min. With 3mhz it is slightly faster, but not necessary IMO.