1066
Ten volunteers were tested at 18 , 000 ft ( 5 , 486 m ) , and through 12 , 000 , 8 , 000 , and 5 , 000 ft ( 3 , 657 , 2 , 438 , and 1 , 524 m ) with directional sounds recorded via a dummy head microphone and presented binaurally .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None