LXXXVII.The minimum perceptible change of intensity of a pure tone

Interaural Intensity Difference Limen

“…Although the previous reports of Churcher, King, and Davies (1934) and of Upton and Hoiway (1937) showed that intensity discrimination under diotic conditions was superior to discrimination under monotic conditions, the findings in the present study that this difference is significant is worth noting. Figure 6 provides a comparison of data from the present study for 250 Hz with the data for 800 Hz from Churcher, King, and Davies.…”

“…Comparison of monaural and binaural DL(i^) of present study with monaural and binaural DL(i) fromChurcher, King, and Davies (1934) rc h e r, K ing, a n d D a v ie s, 8 0 0 Hz, m o n a u ra l OL ( i ) a s a fu n c tio n of s e n s a ti o n level □ ------------□ C h u r c h e r , K ing, a n d D av ies, 8 0 0 H z, b i n a u r a l D L ( i ) a s a f u n c ti o n of s e n s a t i o n lev el ------------^ P r e s e n t s t u d y , 2 5 0 H z, m o n a u r a l DL a s a fu n c tio n of h e a r i n g lev el P r e s e n t s tu d y , 2 5 0 H z, b i n a u r a l DL a s a f u n c ti o n o f h e a r i n Comparison of low-frequency interaural DL(^) of present study with low-frequency interaural DL(^) fromGage (1935) Comparison of mid-frequency interaural DL(i) of present study with interaural DL(i) fromChocholle (1957) …”

“…Effect of level. Churcher, King, and Davies (1934) examined intensity discrimination with telephone receivers at 800 Hz under both monotic and diotic conditions. They found the DL(^)y^^^ to vary from 2.1 dB at 10 dB SL to 0.38 dB at 90 dB SL.…”

Cumulation of Just Noticeable Difference for Intensity in Normal and Impaired Ears

“…In each case these investigators used a psychophysical method which yielded a jnd rather than DL (if we are to adopt Harris' terminology). Typical of these data were those of Riesz,4 Doerfler,5 Goetzinger,6 Tonndorf et al,7 and Churcher et al 8 Although they noted dis¬ crepancies in the size of the jnd's reported from one study to another, they also ob¬ served that a basic similarity existed which united the studies. All demonstrate that the relative jnd diminishes in magnitude as the intensity of the stimulus is raised.…”

Interaural Intensity Difference Limen

“…Churcher, King, and Davies (1934) examined intensity discrimination with telephone receivers at 800 Hz under both monotic and diotic conditions. They found the DL(^)y^^^ to vary from 2.1 dB at 10 dB SL to 0.38 dB at 90 dB SL.…”