How to find whistle register ?

[Jonho15]

I'm a male who has been singing in falsetto almost their whole life. Of course I do sing in chest but I find singing in falsetto more comfortable. So today I was practising and I suddenly had this idea to try singing Emotions by Mariah Carey, so I listened to the song several times to get to understand it better and I was really intrigued with the Whistling parts of the song. So instead of trying to sing then song, I tried finding my whistle register but I was only singing in falsetto the whole time, until I breathed out in between singing and I made a squeak. So I tried focusing on the feeling and I was able tooit very high notes, higher than I thought I could hit. I was concerned whether it was just a really high falsetto but it felt slightly different than a falsetto, instead of feeling the sound coming out from my throat, I could feel vibrations in my head and the sound seemed to be coming from in between the back of my nose and mouth. I was pretty happy with the sound of it so I this time I actually tried singing the song, it sounded okay until I reached the whistling before then chorus and instead of the smooth high sound coming out, a weird falsetto came out instead. After that I went and read about the whistle register and I came upon one where the author of the page talked about how whistling with the wrong technique will damage your voice. I was instantly worried so I came here looking for tips on singing with the whistle register. How do I know I'm actually singing in my whistle register and how to incorporate it into my singing. Thanks in advance !

 

[VomitHatSteve]

I don't know that any regulars here use the whistle register. (Heck, most of us probably don't really know what it is.)
I use a lot of falsetto, but have never tried to experiment with whistle. Honestly, I'd be too afraid of hurting myself. If I wanted to try, I'd probably consult an vocal coach.