CD's, because of highen loudspeakers frequency response, have a high end frequency rise
what does equalizing it to the soundfield mean anyway? Is this diffuse field equalizing? in this case isn't the headphone equalized to a random soundfilled room?
i need to use canal phones that have a frequency response that is flat at my ear drum
But how do you equalise an IEM to your ear canal ?
what the hump in the etymotics frequency response is? If its in your ear drum why the hump ?
Anyone know what the hump in the etymotics frequency response is? If its in your ear drum why the hump ? shouldn't it be flat with just a high frequency roll off?
Diffuse sound field is a field where sound comes from all directions equally, as opposed to a free sound field where sounds comes from one or more localized points. A real world example that's close to the definition is a good reverberant hall for diffuse and very open space with no reflections for free.Diffuse field equalized headphones work with sounds picked up from diffuse field equalized microphones. Microphones with pick-up patterns such as omni, which are usually used as overheads; they pick up any sounds from all directions, including the the "room". Dummy heads+these microphones will pick up HRTF information also for binaural recordings.Unfortunately, studios recordings are unlike live recordings. Sounds are picked up mostly in the free field; that's like something screaming into your ear. That's fine because speakers do not play into your ears. Headphones and IEMs are going to have this problem. It has nothing to do with HRTF at this point.The 5dB drop @10kHz for the ER-4S is really to compensate for a similar boost to most recordings because of a similar drop from speakers to ear. It has nothing to do with the above problem.You can also check a summary I did on Head-Fi a few years back on the ER-4B.Quote from: gaillard on 29 September, 2006, 02:09:05 PMAnyone know what the hump in the etymotics frequency response is? If its in your ear drum why the hump ? shouldn't it be flat with just a high frequency roll off?This is to compensate for the internal resonance of the ear canal when you plug it shut (with the IEM).