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Definition
| The perception of the location of a sound source. |
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| In hearing, specifies location that vary from left to right relative to the listener. |
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| Interaural time difference (ITD) |
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Definition
| When sound is positioned closer to one ear than to the other, the sound reaches the close ear slightly before reaching the far ear, so there is a difference in the time of arrival at the two ears. The ITD provides a cue for sound localization. |
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| Interaural level difference (ILD) |
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Definition
| The greater level of a sound at the closer ear when a sound source is positioned closer to one ear than to the other. This effect is most pronounced for high-frequency tones. The ILD provides a cue for sound localization. |
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Definition
| The shadow created by the head that decreases the level of high-frequency sounds on the opposite side of the head. The acoustic shadow is the basis of the localization cue of interaural level difference. |
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Definition
| In hearing, sound locations that are up and down relative to the listener. |
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Term
| Head-related transfer function (HRTF) (Monaural cue) |
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Definition
| The difference between the sound from a source and the sound actually entering the ears that is caused by interaction of the sound with the head and the pinnae. This difference provides a cue for auditory localization because a specific pattern of frequencies is associated with each location in space relative to the listener. There is proof of this from experiments done fitting pieces of clay in the pinnae. |
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Definition
| Sound that is transmitted directly from a sound source to the ears. |
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| Sound that reaches the ears after being reflected from a surface such as a room's walls. |
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| In hearing, when sounds that are presented simultaneously at two different locations are perceived as one sound coming from a single location. |
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| The effect that occurs when two identical or very similar sounds reach a listener's ears separated by a time interval of less than about 50 to 100 ms, and the listener hears the sound that reaches his or her ears first. |
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Definition
| The time separation at which two sounds presented at different locations are no longer fused, so two separate sounds are heard. At separations shorter than the echo threshold, the two sound sources are head as one. |
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