Disadvantage of non-speech Auditory Low resolution: Many auditory parameters are not suitable for high-resolution display of quantitative information. Using sound volume, for example, only a very few different values can be unambiguously presented (Buttoned al., 1991). Vision has a much higher resolution. The same also applies to spatial precision in sound. Presenting absolute data is difficult: Many interfaces that use non-speech sound to present data do it in a relative way. Users hear the difference between two sounds to tell if a value is going up or down. It is difficult to present absolute data unless the listener has perfect pitch (which is rare). Lack of orthogonality: Changing gone attribute of a sound may affect the others. For example, changing the pitch of a note may affect its perceived loudness and vice versa (see Section 3). Transience of information: Sound disappears when it has been presented; users must remember the information that the sound contained or some method of re-playing must be provided. In vision the user can easily look back at the display and see the information again (this is not always the case -think, for example, of an air-conditioning system: its sounds continue for long periods of time and become habituated. Sounds often continue in the background and only become apparent when they change in some way). Annoyance due to auditory feedback There is one problem with sound that has not yet been mentioned but it is the one most commonly brought up against the use of sound in user interfaces: annoyance. As this is an important topic, it will be discussed in detail in Section 2.4.
Posted on: Tue, 11 Mar 2014 01:49:56 +0000
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