https://www.ubergizmo.com/2011/02/philips-iphones-ipads-digital-audio-recorders/
Philips to turn your iPhones and iPads into digital audio recorders | Ubergizmo
Philips has just announced that they will be releasing a recording app for the iPhone and iPad. All users need to do is run the app and...
digital audio recorders
https://www.ojp.gov/ncjrs/virtual-library/abstracts/average-direct-current-offset-values-small-digital-audio-recorders
Average Direct Current Offset Values for Small Digital Audio Recorders in an Acoustically...
digital audio recorders