the i-doser site says that they recommend the Sennheiser RS130 wireless headphones http://www.sennheiserusa.com/newsite/pr ... sid=009925
but they only have a frequency response of 18 Hz minimum... how do they hear those doses of 8Hz or even 0.5Hz if the headphones dont that far? (or am i completley wrong with this?)
Human hearing is only from 18-20hz to 20-22,000 hz. I-Doser says something about hearing a different tone in each ear produces the effects of lower frequencies. Or something.
oh... so those 0.5 Hz are a difference between them... oh yeah, i've heard that before... so at what Hz levels does i-doser operate, i wanna get good headphones...
Speaking of wich there is a new model [the recomended one is Sennheiser RS130 and the new one is Sennheiser RS140 ]
Should we get the Sennheiser RS140 ?
The "average" person's hearing range is 20-20k htz. I say average because this standard was set before the onset of commercially available headphones and the walkman and related devices. In actuality, most people can only really hear from 30-35htz to around 12-15k htz. Outside of that range is generally felt (on the low end) or experienced as "open-ness" on the high-end. The effects of infrasonic sound comes from the difference in two tones. A 200htz tone in the right ear, and a 208htz tone in the left will produce an aural sensation which is known as "beating" or "beats". The frequency of the beating in the example above would be 8htz.
