SHUTT: EXPERIMENTS IN JUDGING THE DISTANCE OF SOUND. 5 
IAD AY 
(a) Telegraph Snapper. 
(b) Pitch Pipe. 
Die. BoB Awl” Die Rees Bs AwsiCon Ay 
| 
Re BS) BS oA gk |) STAR Ah dae ete S416) b 18%9),1 10:6 
10 | 13.3 | 12.2 | 1¢.5 | 14.6 | 13.4 10 | 20.3 | 22.6 | 22.7 | 21.0 | 21.6 | 17.5 
15 | 16.4 | 17.9 | 18.8 | 200 | 18.2 15 | 36.5 | 26.3 | 29.3 | 27.8 | 27.4 | 22.8 
20 | 22.8 | 21.8 | 22.0 | 23.9 | 226] 20] 30.5 | 29.9 | 30.7 | 29.7 | 30.2 | 264 
95 | 21.6 | 25.8 | 26.8 | 291) 25.8} 25 | 32.0 | 30.4] 31.9 | 31.0] 31.4 | 28.6 
30 | 27.5 | 30.1 | 32.0 | 31.1 | 30.1 30 | 33.0 | 34.5 | 33.9 | 34.6 | 34.0] 32.0 
35 | 35.0 | 34.8 | 34.7 | 35.6 | 3 2 35 | 37.7 | 36.2 | 37.3 | 37.6 | 3721] 36.2 
40 | 38.7 | 37.7 | 36.0 | 37.3 | 37.4 40 | 35.8 | 404 | 37.1 | 39.4 | 38.1 | 37.7 
45 | 41.2 | 40.4 | 40.3 | 40.2 | 40.5 45 | 41.3 | 39.7 | 41.6 | 41.0| 409] 40.7 
50 | 42.0 | 42.1] 417 | 42.3 | 42.0] 50] 42.8 | 420 | 42.6 | 40.0] 41.8 | 41.9 
Total.... |275 |271.1 |271.1 |274.1 l279.5 272.6 | 275 |311.7 )316.1 1322.4 [316.7 |316.5 | 294.4 
The sums of 
those in (b) are much too large. 
the averages in (a) are 
all fairly accurate, while 
The most favorable position in 
(a) for judging the distance was with the face toward the sound. 
In (b) the results obtained with the right side in that position are 
the nearest correct. 
The most unfavorable position in (a) was 
with the back toward the sound, and in (b) with the face toward 
ity 
Table V gives the average errors stated in percentages of the 
distances at which the sounds were produced. 
