early childhood

early childhood

3D Sound - A binaural explanation - Kunstkopf - ASMR?

7m ago
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LIVE 3D binaural pod cast (when streaming): http://dyt.radio12345.com who else is streaming? http://www.shoutcast.com/Internet-Radio/binaural Be sure to wear headphones or you just wont get it! Due to Google requiring users to have a Google+ account to comment on videos:- comments are now disabled .Best to listen with headphone for the"extra" dimension other than the "left" and "right" perception you will get using speakers. In acoustics, dummy head recording (also known as artificial head or Kunstkopf) is a method used to make binaural recordings, that allow a listener wearing headphones to perceive the directionality and the room acoustics of single or multiple sources. Human perception of the direction of a sound source is complex, and consists of: 1. Simple "left-right" information can be gained from relative level differences and time of arrival differences of the sound in each ear. 2. For percussive sounds, the impact of a shock wave can register perceptibly on the skin (typically the upper torso), with the earliest and strongest sensory stimulus coming from the regions of skin aligned perpendicular to the direction of the sound source. 3. The human head imprints frequency-dependent distortions of phase and amplitude on sound reaching the eardrums, that are frequency-dependent level differences and these distortion effects vary with the direction of the sound source (being caused by the geometry and sound-transmitting characteristics of the sinus and throat cavities, eustachian tubes, inner ear, external ears, and other hard and soft tissues in the head and upper body (see: head-related transfer function, "HRTF"). Conventional stereo recording only makes use of left-right information. Dummy head recording uses both left-right information and frequency-dependent distortions. Methods There are three main ways of making a recording that uses this last effect to encode directionality information: 1. dummy head recording uses an artificial model of a human head, built from selected acoustic materials to emulate the sound-transmitting characteristics of a real human head, with two microphone inserts embedded at the "eardrum" locations, 2. simulated dummy head recording processes a signal electronically to imprint the HRTF information associated with a specified direction, and 3. finally, a pair of specially-designed microphones can be worn by a volunteer, fitted inside their ears, to make use of actual intra-cranial acoustics. Limitations Because each person's pinnae are unique, and because the filtering they impose on sound directionality is learned by each person from early childhood, the use of pinnae during recording that are not the same as the ultimate listener may lead to perceptual confusion. http://en.wikipedia.org/wiki/Head-related_transfer_function http://en.wikipedia.org/wiki/Dummy_head_recording http://en.wikipedia.org/wiki/Phase_%28waves%29 http://en.wikipedia.org/wiki/Amplitude The video icon I used showing a cartoon character with no ears is just my way of trying to be funny, as it would only be suitable if the listener was using SPEAKERS to listen to this.. laugh you may, but if you are listening to this with speakers, then I'm afraid that the joke is firmly on you.