106 
In their experiments ZWAARDEMAKER and Quix ') arrived at the same 
conclusion. 
TABLE VII. 
Een | kak 
Irreg. sentences. | Reg. sentences. | 
5 i I | 
| | 
Subj M M.D CN. | M 
Be. VANS B08 Oena Samael 3.63 
OMS ee Nee oie 2.93 
DP.” yig2-64 | 0:58 2:50: || 3.65 | 
The mean distance at which whispered sentences of from 3—14 
syllables are heard amounts to + 3.42 m, as shown in Table II 
3.42 
and IV, so that the index loquelae is enen 
SUM MARY. 
tl. Our material consisted of sentences of 3 to 14 syllables. They 
were presented by means of whispers with reserve-air. 
2. We determined the intensity of hearing of our subjects by 
means of separate words, composed of isozonal and aequi-intensive 
sounds. With all of them audition appeared to be normal; the 
distances for different words varied from 6 to 30 m. 
3. The difficulty of hearing sentences increases with the number 
of syllables. The difference in the distances at which sentences of 3 
syllables and those of 10 or more syllables are heard, averages 1.83 
m. (whispers). 
4. Generally the decrease of the distance in proportion to the 
increase of the number of syllables does not take place gradually. 
Sentences of an odd number of syllables are as a rule heard better 
than those of an even number containing one syllable more. Even 
sentences of 9 syllables are heard on an average 0.33 m. farther 
than those of 4 syllables. The reason is that symmetrical construc- 
tion, which aids our hearing faculty, occurred more with an odd 
than with an even number of syllables. 
5. Proverbs and proverbial sayings are heard at larger distances. 
However, the favourable influence of proverbs and proverbial sayings 
') De studie van het spraakgehoor. Onderzoekingen Physiol. Lab. Utrecht (5) dl, 5 
blz. 1. 
