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The ERB-rate scale, or ERB-number scale, can be defined as a function ERBS(f) which returns the number of equivalent rectangular bandwidths below the given frequency f. The units of the ERB-number scale are known ERBs, or as Cams, following a suggestion by Hartmann. [ 3 ]
Some non-mel auditory-frequency-scale formulas use the same form but with much lower break frequency, not necessarily mapping to 1000 at 1000 Hz; for example the ERB-rate scale of Glasberg and Moore (1990) uses a break point of 228.8 Hz, [15] and the cochlear frequency–place map of Greenwood (1990) uses 165.3 Hz.
[6] [7] The ERB can be converted into a scale that relates to frequency and shows the position of the auditory filter along the basilar membrane. For example, ERB = 3.36 Hz corresponds to a frequency at the apical end of the basilar membrane, whereas ERB = 38.9 Hz corresponds to the base, and a value of 19.5 Hz falls half-way between the two.
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The pioneering work of Ladefoged [16] used the Mel scale because this scale was claimed to correspond more closely to the auditory scale of pitch than to the acoustic measure of fundamental frequency expressed in Hertz. Two alternatives to the Mel scale are the Bark scale and the ERB-rate scale. [17]
In response to the growth of smartphone use, in November 2011, CTIA, a group of major U.S. companies representing the wireless industry, and ESRB announced the co-development of a free, voluntary ratings process for mobile app stores. The system uses ESRB's icons and content descriptors, along with four additional "Interactive Elements ...
Educational Records Bureau (ERB) is a private, American educational nonprofit organization that provides standardized tests for both admissions (entrance exams) and annual assessments for 2,000 private and selective public schools during pre-K to grade 12.
The Gifted Rating Scale (GRS) is a scholastic assessment for school children. It is used mostly for Gifted & Talented admissions. It is administered by a teacher who knows the child well. The teacher rates specific gifted behaviors that they have observed over time. [1]