extended techniques: "bowing" tubular bells and tambourine-like effect?

[ARCMusicPublishings]

Hello, Good-Music-Guide community! First post here!


So, I have two inquiries:

1 - According to this Wikipedia article: Tubular bells - Wikipedia,

"They can also be bowed at the bottom of the tube to produce a very loud, very high-pitched overtone."

I was a bit curious about the mention of this, and want to see if I can learn as much about it as possible.

Does this technique use string bows? Or the default TB Hammer mallet?

Also, is there a video that can demonstrate this? I've searched "tubular bells" "bowing" and "tubular bells" "bow". I couldn't find anything about it.



2 - In this very nice TB performance by Dr. Geoff Shiel, there were moments of tambourine-like effect. (e. g. 3:42-45, 5:15-20, 5:31-33, 5:58-6:12)

(As I'm assuming certain tubes were reconfigured in an irregular way) How was this secondary sound produced? 

Thanks for your help!

[relm1]

I would imagine it is just like using a double bass bow on other tuned percussion.  Like this on the vibraphone.