Responses to ambient sound recording

["Pratap Singh"]

I am grateful to all who have responded to my request for suggesting sound 
level meters. I am looking at various options suggested and learning the 
technical issues involved. My main purpose is to explore possible linkage 
between geographical variation of vocalization parameters of  Grey-hooded 
Warbler (a bird common in Himalayan foothills) and  ambient noise variation in 
different habitats.

Many of the sound level meters  I have searched on the web  give frequency 
range from few hertz to 8000 hertz. The warbler I am studying sings from 2500 
htz to about 9000 htz. I am not competent enough to understand fully the 
implication of using 8000 Htz meter. I guess that the sound meter should have 
freq range exceeding band width of the warbler vocalization. I request for 
comments.

Pratap Singh