All the text, including three vowels with a repetition, Arabic digits, Al-Fateha, and common words, was recorded and stored in two different audio formats, wav and nsp.
Recorded samples were divided into the following 22 segments: six segments for vowels (three vowels plus their repetition), 11 segments for Arabic digits (zero to ten), two segments for Al-Fateha (divided in this manner so that the first part may be used to train the system and the second part to test the system), and three segments for the common words.
The AVPD contains 14 isolated words: Arabic digits (zero to ten) and three common words.
But, what is important in the context of this article is that different studies have shown that PSE is larger when operands are presented as number words than when presented in Arabic digits format (e.g., Campbell, 1994; Campbell & Alberts, 2009; Campbell & Clark, 1992; Campbell & Fugelsang, 2001; Campbell & Penner-Wilger, 2006; Jackson & Coney, 2007a; Noel, Fias, & Brysbaert, 1997).
In other words, we aim at exploring whether format effects also occur after the potential visual familiarity of Arabic digits format is removed.
Arabic Number Comparison: Two Arabic digits from 1 to 9 (Arial, 48-point font) were presented on the computer screen and children were asked to select the largest digit in numerical size.
Physical Size Comparison: Children were presented with two identical Arabic digits (on a white screen) and were asked to select the largest digit in physical size (e.g., 2-2, Arial, 65 pt or 72 pt).
Thus, for instance, if a multiplication such as 3 x 4 is presented as Arabic digits, it has to be transcoded into a verbal format before the result can be retrieved.
Subsequently, calculation is said to take place mainly in Arabic digits (Campbell, 1994; Campbell & Clark, 1992): therefore, this code will also facilitate access to the results of arithmetical operations.
But, with age, their growing experience with Arabic digit
comparison would lead them to develop long-term memory associations between the digit pair to be compared and the correct response.
Figure 4 shows a sample comparison between PNFR, Mfpscc and corresponding MFCC features for Arabic digit one obtained before DCT operation for different SNR levels.
In the experiments reported in this paper, isolated digit recognition experiments were performed using the Arabic digit corpus database from the national laboratory of automatic and signals of University of Badji-Mokhtar Annaba Algeria, which were designed to evaluate the performance of automatic speech algorithms.