Prototype choice - summed up conclusions
Alarms that sound like "real life" alarms are considered as the best alarms possible.
High spectrum, simplicity and lightness can produce recognizable feedback yes samples.
Length ~0.25 sec, stable mel profile and low spectrum fit very well with a feedback no function.
Clear downhill profiles are good for mail in samples, although stable or uphill slight alarms are not bad.
An image of something being thrown in the air is excellent for mail out samples. Clearly uphill samples are also very good.
Also, the inclusion of images and simple expressions in the profile would be a good thing, to quickly give an overall idea of the category.