I would linke to aquire a natural horn to play a very low pitched tone. I am not educated in music, so I don't even know how to describe the tone in a correct way (is it "low pitched"?), but I found a fitting tone in a YouTube video:  

I have not succeeded in finding out which properties will affect the tuning of such an instrument (diameter, length, form, material, etc.), so I was hoping to find some advice here. Best case information for me would be the name of a specific instrument and a link to a video or sound file. But it would also help me to get a hint how to better phrase my requirement (in technical more correct terms).

Thanks a lot for any help!

I would like to acquire a natural horn to play a very low pitched tone. I am not educated in music, so I don't even know how to describe the tone in a correct way (is it "low pitched"?), but I found a fitting tone in a YouTube video: 

I have not succeeded in finding out which properties will affect the tuning of such an instrument (diameter, length, form, material, etc.), so I was hoping to find some advice here. Best case information for me would be the name of a specific instrument and a link to a video or sound file. But it would also help me to get a hint how to better phrase my requirement (in technical more correct terms).