If I recall correctly, you're given a diagram of some sort to go with it. That's how I solved this puzzle.
Like you suggested I've been looking at Spoiler range of sounds, Elizabeth Raunchier studies all in the area of changing human emotions via sound. You've given me so many spoilers I dont think there are any left to give apart from the answer! I've tried different sound waves and everything possible (apart from the correct answer of course!)
Spoiler The answer is a range of sounds. According to the wiki page on sound, there are two ranges outside human hearing (below 20hz and above 20khz). One of these is the answer.
Ah, I forgot about that. For the most part no, it's just a voice over I did to introduce each section, but there is one clue that's kinda important. The picture involved is the only thing that matters, I'll post a link to it shortly.
The video for Paint it Black is another intro and doesn't have anything important. So long as you can get to the PDF you should have all you need. It's the same way for pretty much the rest of the mission as well. The list of helicopters I put into the answer field for Paint it Black might not have been exhaustive, there's a character limit and I'm no expert on aviation. I also wrote this a good year and a half ago so it's possible a new one has popped up. If the one you found matches the specs required, and it's not working, see if the name you are using is the same as the title of the wiki page (my general rule of thumb when it comes to checking answers). Spoiler It's kinda like how you were using infra wave instead of infra sound for Blinded with Science. There are multiple ways to name a helicopter, you might be using one that isn't covered by the field.
Glad you were able to navigate through it without too much difficulty. I figured the last segment would be a good way to wrap up the mission. I was a bit worried about people overthinking it so I have the format of the answer just in case.
Oh hey, it's nice to see that this mission is still kicking around. Spoiler So long as you correctly identified the meeting spot from the last part of the mission, this part can be easily solved by brute force if nothing else. I've always thought this is a part I could've done better, the instructions are kinda vague and may not work anymore. I did most of this through google maps, and is how I suggest you try and find the bridge too. If you don't see it at first try zooming in, it might not be visible farther out. Both German and English names of the bridge work in case you were worried about that.
Cheers Treble, I am indeed going through the sandbox missions at the moment, which is fun as they are "quick ones" but frustrating as it is often not well documented on the forum. Spoiler Our German city is a city with very few bridges over the river... you can get a list of them on wiki, and I have brute force it already but do not seem to work. Spoiler 3 bridges for 3 politicians ...
Spoiler Look at the time stamps in the communication log, but ignore the typo at 01:07. The fleeing strike team has been travelling northwards for about half an hour. You may have to widen your scope a little
I went this route and as you said in your first answer to me ... I have missed it #facepalm Spoiler Done the one before and the one after, but missed this one the hint on timelog is very helpful Thanks for the support agent ... and obviously for the whole sandbox.