Hi Ian, and everyone else.
I got the term Response form a paragraph i read while comparing harmonicas , when looking to buy one.
I copy and paste some of the context.
“The legendary Special 20 harmonica offers unique qualities in its response, superior bending, and a rich tone. Featuring a durable, airtight, plastic comb, it has become the harmonica of choice for recording artist John Popper (Blues Traveler), as well as musicians that enjoy a wide variety of genres from country and folk, to rhythm and blues. Available in 12 major keys as well as a special Country Tuning, which features a major 7th when played in the cross harp position.
With their excellent response and great tone, diatonic harmonicas from HOHNER have earned a worldwide reputation for the finest quality. They are frequently referred to as “Blues Harps” and are primarily used as melody instruments in blues, rock, pop, country and folk as well as other styles.
German craftsmanship provides superior response, bendability and tone
Precision molded plastic comb for unmatched comfort and durability”
i do believe this is where i got response from , i may be wrong, i did a lot of homework, when buying a harmonica.
The word Response is mentioned 3 times.
I hope this is enough info for you to help me.