Audio Measurements

Caleb (a.k.a. Dad) performed a few measurements with the Annoyinator, and found absolutely amazing results!

Many thanks to Listen Inc. for letting me the great SoundCheck software to do these measurements

Here is the frequency response of an iPod Touch 5th gen, with and without the annoyinator!

Annoyinator with and without the annoyinator.  Measured straight ahead, at 40cm. See the 25 dB gain! That’s over 300 times more power in the direction we’re pointing!  How to go from dB to power?  10^(dB/10).    10^(25/10) = 316 times the power!
Screen Shot 2013-06-11 at 4.45.31 PM
Directivity Index of the Annoyinator, as measured around the device. You can see that the directivity is great (about 10 dB) from about 4 kHz up to 8kHz. Above 8kHz the horn is no longer a great radiator, and we loose directionality.

And finally, the polar response. The directivity index plot above uses data from this chart.

Annoyinator polar response
Polar response shows the response of the Annoyinator at a few frequencies, but all around the device.