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Yes, one can localize sine waves lower than 2657hz, easily. It is commonly accepted that very low frequency sounds become hard to localize, as was noted by someone else as employed in use for subwoofers. In spite of this, in some environments localizing low frequencies can be done without difficulty for binaural listeners. I have found that even when my ears have a hard time telling which direction is the source of a very low tone (under 100hz), that pressure on my skin of my arms, legs, or face indicates the direction of the source. Low frequency sounds tend to be able to move around corners or bends without difficulty, causing spreading through the room, and reflections in rooms, making localization harder. Further, standing waves can be present in rooms causing regions in the room that have intensified low freq sound where the standing wave antinodes, and nulls where the standing wave has nodes. bret --- Mark Hamburg <mark_hamburg@baymoon.com> wrote: > Don't forget the harmonic series. Can one tell where a sine wave of > less > than 2657 Hz is coming from other than by volume differences? > > Mark > > on 7/2/02 9:55 AM, Bret at echoplex@yahoo.com wrote: > > > > > --- Mark Sottilaro <sine@zerocrossing.net> wrote: > >> (note, if the waveform is longer than your ears are apart, you > can't > >> tell > >> where it is in a stereo field) but most people are so drunk or on > >> extacy that > >> they don't notice much. > > > > Let's see, the eardrums on a human head are about 5 inches apart, > or > > .42 foot apart. > > The speed of sound in air is about 1116 ft/sec. > > Speed = Wavelength * Frequency, so > > Frequency = Speed/Wavelength > > Thus, a wavelength of 5 inches (.42 foot) has a frequency of about > > 2,657 hz (1116/.42 = 2657). > > > > A person with normal binaural hearing can certainly tell where a > tone > > of less than 2,657 hz (i.e. longer than .42 feet) is located in a > > stereo field, or 3 dimentional space, so I don't understand how you > can > > assert 'if the waveform is longer than your ears are apart, you > can't > > tell where it is in a stereo field'. Maybe I misunderstand your > > statement? > > bret > __________________________________________________ Do You Yahoo!? Sign up for SBC Yahoo! Dial - First Month Free http://sbc.yahoo.com