Capture high or low frecuencies with a Phone

[amedina]

Hi all,
it is possible to record or capture frecuencies above the 19Kh or lower the 20hz with a cell phone, like an iphone? I'd like to make an app to capture frecuencies that the human ear can't. Is that possible?

Thanks.

 

[ssddx]

http/blog.faberacoustical.com/2009/ios/iphone/iphone-microphone-frequency-response-comparison/