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Posts by jcx

it is an engineering discipline, lots of detail, fundamental limits - effective techniques may not be practical unless you own the building can get to leak paths in floors, ceilings, ducting, doors - just beefing up a wall's sound absorption may not do anything if the sound can get around it   http://www.greengluecompany.com/benefit/how-to-use-it
that seems backwards - truncation or rounding adds distinctive spitting, hissy amplitude jumps during fades, good dither gives smooth music signal fades below the lsb - but can add audible but constant noise that we can easily "listen through"    http://audio.rightmark.org/lukin/dither/dither.htm   noise shaping is applied with dither, changes the dither noise spectrum to be lower where our hearing is most sensitive, reducing dither noise audibility     I bet few...
I'm not so sure - "openness" seems like it should be different from "protecting ignorance" and education does involve making some value judgments some statements are false, some ideas wrong, not predictive or valuable to others - no matter how personally deeply held, seemingly supported by unexamined personal experience the prohibition of presenting DBT based Science, asking for how someone's listening comparisons were controlled for known human perpetual, memory...
"recabling" ES headphones is not recommended - the cables use special construction, materials that are not commonly available for low capacitance and Safety with kV drive levels   a plug adaptor is much easier to do with lower risk   at worst use the Koss or Stax extension cable for the wiring   but again you need the skill, knowledge to safely construct, insulate, strain relieve, generally safely deal with up to 1000 V in a product you are going to handle, put on...
Binaural recordings can be fun, a step up - until you turn your head   to address that failing there are head tracking "Virtualizers" - the Smyth Realizer is one some here are familiar with http://www.smyth-research.com/technology.html   http://www.head-fi.org/newsearch?search=smyth+realizer&=Search
the frequency response is usually measured with low Z Vsource - the amount of current at any frequency is determined by the Headphone Z at that frequency, so the power "absorbed" by the headphone varies verses frequency with constant V drive - but to no consequence for SPL vs frequency which is controlled by V alone if the amp output Z is low compared to the headphone   http://www.innerfidelity.com/images/BeyerdynamicT1.pdf   with the T1 spec of 600 Ohm nominal Z and...
http://www.eevblog.com/forum/ is AU centric
there are no legal questions absent an active patent for circuits - I have gone to dozens of IP seminars for engineers/entrepreneurs as a electronic equipment designer over my 30+ year career, have a patent, have searched for prior art for companies I worked for   only an active patent can protect a circuit - publish and don't file a patent application within a year and you have "open sourced" the circuit - it is free for any to use without any restriction, it becomes...
sorry folks - there is no real legal protection of circuits, hardware builds except for patents - active patents in the country the device is sold in   many in the hobby community would like to believe otherwise, may be confused with software copyright protection, the blizzard of copyright license terms for software attempting to assert "open, noncommercial" terms   headphone amps typically don't contain copyright software   exact mechanical/photo copies of a PCB...
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