BTW, again, regarding the trail awareness type bell, before buying the Timber or Awareness Bell, try rigging up your own from stuff you probably already have or can get cheaply.

Saturday I rigged up two Christmas jingle bells side by side with nylon zip ties. One is gumball size, the other slightly larger than a golf ball. Different tones. Using a keychain quick release I hooked the jingle bells next to my flipper type Incredibell knockoff. The three would clatter together on most surfaces, producing three tones.

I video recorded my ride to check responses from folks on the MUP. The combination of three bell tones seemed to get more attention, farther in advance, than the single bell tone I'd been using (with one or more identical jingle bells). In particular I noticed the kidlets on their training bikes and meandering around without looking were much more attentive to the sound -- possibly because it sounded like an ice cream truck or those jingles so familiar to kids from their toys, mobiles over their cribs and play pens, etc.

I knew the wind would obscure some sounds so at one point I set my video camera on a sign post and recorded myself riding by a couple of times. It definitely helps aurally indicate whether a bike is approaching or receding, approximate speed, direction and distance.

To me, on the bike, it seemed plenty loud enough, but from the camera it seemed a bit quieter than I'd like. However that may be due to the bike camera's mediocre audio. I'll try another with a couple of different cameras with better audio.

Mounting would also help. At times the bells were a bit muted by the small handlebar bag I use to hold my phone, spare batteries, etc.

But it's working well enough for my purposes. I could see neighbors in the quiet residential areas I ride looking up from their porches and yards, but they didn't appear annoyed. And it seemed more effective than a single tone bell on the local MUP on a typically busy weekend in pleasant weather.