Combine this cheap and easy hack with iPodLinux and get a wide-frequency mic for your iPod. With Linux installed the iPod will record at sample rates up to 96 KHz. This gives the iPod a theoretical frequency response of about 48 KHz (half the sample rate). This is well into the ultrasonic range; the average human can’t perceive much above 18 KHz (there’s a lot of discussing on the web regarding how these high frequency sounds affect the listening environment but that’s a little beside the point here, this mod isn’t going to provide you with an audiophile experience). This mic is not particularly loud or very good at picking up detailed sound but it will record into the ultrasonic range.
First, load iPodLinux onto your iPod…Read More