HiFlight
Headphoneus Supremus
I have been following with considerable interest the discussions regarding tip-rolling and the effect of various tips on the perceived sound. This has been of particular interest to me as the physiology of my ear canals preclude the use of deep insertion tips as well as foams. I have done considerable research on the physiology of the human ear canl and its effect on frequency response.
As each persons ear canals differ, the resonant frequency also differs. The ear canal itself is responsible for amplifying sounds in the 2000 to 4000 hz range, more or less. Anything that is inserted into the ear canal will affect the response. This obviously includes foams, tips of differing lengths, etc. The smaller the diameter of the ear canal, the more sensitive it also becomes to sounds in this frequency range.
Due to the shape of my ear canals (small diameter, sharp bends, I can only use large silicons that actually cover the outside of my ear canal rather than entering them. I have found that this type of tip actually reduces the variations that I experience between headphones, as inserted tips seem to affect the resonance and resulting frequency response more than the actual frequency curve of the headphone itself. Of course the tip covering the entrance to the ear canal must provide a leak-proof seal to preserve the bass response designed into the headphone.
Since the human ear is designed to be most sensitive at these resonant frequencies, very small changes in the shape or length of the ear canal can result in very large changes to what we actually hear with a given set of phones.
Regarding my previous comments regarding the Flares vs EM8513, I suspect that to my ears the fact that they sound more alike than different is because I am using the same type on tips on both and due to my exposure to years of aircraft noise, I do have some high-frequency hearing loss hence the roll-off of the Cardas is not as noticeable to me.
Bottom line of this is to just be aware of the fact that ANYTHING inside the ear canal will result in significant changes to what your brain has learned from years of listening! It is no wonder tip-rolling can result in huge changes to the sound of an earphone.
As each persons ear canals differ, the resonant frequency also differs. The ear canal itself is responsible for amplifying sounds in the 2000 to 4000 hz range, more or less. Anything that is inserted into the ear canal will affect the response. This obviously includes foams, tips of differing lengths, etc. The smaller the diameter of the ear canal, the more sensitive it also becomes to sounds in this frequency range.
Due to the shape of my ear canals (small diameter, sharp bends, I can only use large silicons that actually cover the outside of my ear canal rather than entering them. I have found that this type of tip actually reduces the variations that I experience between headphones, as inserted tips seem to affect the resonance and resulting frequency response more than the actual frequency curve of the headphone itself. Of course the tip covering the entrance to the ear canal must provide a leak-proof seal to preserve the bass response designed into the headphone.
Since the human ear is designed to be most sensitive at these resonant frequencies, very small changes in the shape or length of the ear canal can result in very large changes to what we actually hear with a given set of phones.
Regarding my previous comments regarding the Flares vs EM8513, I suspect that to my ears the fact that they sound more alike than different is because I am using the same type on tips on both and due to my exposure to years of aircraft noise, I do have some high-frequency hearing loss hence the roll-off of the Cardas is not as noticeable to me.
Bottom line of this is to just be aware of the fact that ANYTHING inside the ear canal will result in significant changes to what your brain has learned from years of listening! It is no wonder tip-rolling can result in huge changes to the sound of an earphone.