Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

Are you explicitly saying [because all your posts on this load of tosh suggest you are] that the Cycle training bods recommend you wear headphones all the time?

No BDW!
Cycle training Bods say utilise all your senses and know that the most reliable sense is seeing since you cannot rely on gearing to judge speed and distance nor hear silent vehicles like cycles.

Perhaps the cycle trainer myth comes from the idea that a cycle trainer training method (recommended in a certain iconic cycle training instructor manual) is that a way to test and improve looking back more is to ride without hearing using a sony walkman.