A Psychophysical Investigation of the Frequency-warping Coefficient (Lambda)
The effect of varying the frequency-warping coefficient (lambda) on localisation and discrimination performance was investigated in two experiments. Cochlear modeling was also conducted to investigate the difference between cochlear output for warped and linear frequency stimuli. Both methods suggest that lambda values greater than 0.65 are not optimal for auditory applications. The optimal lambda values found using these methods (0.47, 0.55 and 0.24 for localisation, discrimination and cochlear modeling, respectively) are lower than the value that best fits the Bark scale (0.77). It is recommended that optimal lambda values be determined by psychophysical evaluation.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.