I think this is what we are chasing http://www.ecoustics.com/electronics/products/articles/131062.html I don't have a way to produce a frequency response chart for each headphone. Seems this is going to be a dead end, in that I can only subjectively compare the two. I just can't find a way to quantify compare or contrast them.
On Wed, Aug 31, 2011 at 5:29 PM, Jack Chastain <[email protected]>wrote: > > > On Wed, Aug 31, 2011 at 5:18 PM, Joseph Apuzzo <[email protected]> wrote: > >> Well putting aside the marketing hype why do they make audio equipment >> that produces sound outside of the normal hearing range? >> > > It's the "envelope" that needs to be preserved. Preserving the actual notes > is relatively simple. The "Attack" and "Release" parts primarily > (Attach-Decay-Sustain-Release) with (depending on instrument) Attack being > usually the most important. For percussive instruments or notes, the attack > is normally represented by an extremely high frequency - where the "note" > you actually hear is contained and much lower. Usually. Some > electonicly-generated stuff may differ ;-) > > >> >> "Humans have a maximum aural range that begins as low as 12 Hz under ideal >> laboratory >> conditions,[2]<http://en.wikipedia.org/wiki/Hearing_range#cite_note-1>to >> 20,000 Hz in most children and some adults, but the range shrinks during >> life, usually beginning at around the age of 8 with the higher frequencies >> fading." >> http://en.wikipedia.org/wiki/Hearing_range#Humans >> >> My theory is that by producing sounds outside you are adding back in >> harmonics in an attempt to more accurately reproduce the sound at lower >> volume. I only base this on my observation that the brawler the range the >> lower the volume I need to enjoy the music. >> If this is not the case ( as I can not prove it either way ) then a good >> $22 pair of headphones ( now assuming a good sensitivity of => 105dB/1mW >> ) is all you should ever really need. Thus my inquiry ;-) >> > > You are pretty much right (though it has little to do with volume) - as > long as those $22 phones CAN reproduce the frequency range. What you will > hear is "accuracy" rather than notes. Lack of high freq response tends to > sound muddy. > > An amusing anecdote - I once re-met a friend I had not seen for years, but > usually only spoke to on 2-meter radio. We seldom met face-to-face. When I > did meet him again years later, I felt I knew him, but wasn't really sure (I > found later he had the same feeling). > > Some days later, he called me - and when I heard his voice on the phone, I > knew INSTANTLY who he was. I actually NEEDED the lower frequency response of > the phone system, which imitated the response of the FM Band we used to talk > on - before I could "hear" his voice and remember it! The wider version in > person was way too much information! > > JC > -- > Eschew obfuscation and pompous prolixity. > > Light a man a fire, he is warm for the night. > Light a man afire, he is warm for the rest of his life. > > _______________________________________________ > Mid-Hudson Valley Linux Users Group http://mhvlug.org > http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug > > Upcoming Meetings (6pm - 8pm) MHVLS Auditorium > Sep 7 - DIY 3D Printing and the Makerbot Thing-o-Matic > Oct 5 - Distributed Authentication Systems > Nov 2 - Nov 2011 > > -- /** ** Joe Apuzzo ** Call Sign: KD2AKU ** PGP/GPG: pub key ID BB5C7 **/
_______________________________________________ Mid-Hudson Valley Linux Users Group http://mhvlug.org http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug Upcoming Meetings (6pm - 8pm) MHVLS Auditorium Sep 7 - DIY 3D Printing and the Makerbot Thing-o-Matic Oct 5 - Distributed Authentication Systems Nov 2 - Nov 2011
