Developed? What's that?
Seriously, they look nice. Is ash used often in drums? I don't know squat about them. Banjos are as close as I get to drums, and the rims on those are usually rock maple.
I heard of drums made from ash but you usually don't find them often. Most drumkits are made from maple, birch, poplar and oak.
Ash produces a lively drum tone that projects a clear, cutting sound and full, penetrating tones.
Each type of wood provides certain qualities (found this info at musician's friend):
Maple is most popular for drum making providing a warm, balanced tone.
Falkata is sometimes substituted for maple as it costs less yet shares maple's same sound quality.
Birch is very dense and tough with a harder and brighter sound. It's loud, bright tone makes the wood excellant for recording as it easily cuts through the mix with it's clarity. Birch features enhanced highs and lows with a rediced midrange.
Mahogany has enhanced low end and midrange with reduced highs. The sound is warmer than maple.
Poplar is a low-cost alternative to maple or birch. It's sound is similar to birch or mahogany.
Basswood is another low-cost alternative to maple and birch.
Lauan wood is often referred to as a "select hardwood" and can be thought of as a budget version of birch wood.
Oak has a similar sound to maple with a more porous composition and a powerful, bright sound.
I've even seen a drumkit from DW Drums that's combo of bamboo and birch.