2154
In the normal speech range of 500 to 3 , 000 Hz , an estimated difference of 0 . 99 dB ( - 0 . 17 to 2 . 14 dB ; P = 0 . 09 ) was detected .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 None