Wireless World did a lot of reporting in the early 50,s on hearing ability. Some reports showed that the human ears can detect a difference in arrival time of as little as 1micro second, which is how people can locate a sound source accurately. You might be interested in locating some of these articles and incorporating the findings into your excellent notes. Telephone companies used to test telephone microphones and earpieces in minute detail, using groups of listeners for intelligibility. This was done for at least 20 years to my knowledge. The results should be published in one of the telecommunications journals.

I would like to see an analysis of TV/DVD sound audio bandwidths(not sampling rates), as I am convinced by my ears that the received bandwidth can be extremely narrow and the sound highly distorted.



Regards

Geoff Duddridge