# Information on tests done comparing different recording devices

Information about the devices tested [here](https://docs.google.com/spreadsheets/d/1nBonVm0XlDoaH7n53-50dMasyxTspSmIv5wt82CkyFw/edit#gid=0).

## Procedure
- We created a "source" file with 5 mins from a CHILDES corpus (Thomas) and 5 mins from Seedlings -- this is the file called chain_inout.wav. 
- We played it from a mac computer with all of the devices in an array in front of the computer, in a sound-proof booth. 
- We tested 4 different device types + LENA+olympus (whose results I haven't calculated yet). 
- We then analyzed all of the sound files with our VTC and calculated % frames correctly classified (as FEM MAL CHI & silence -- there was no other child in these audios, an issue to improve in the next test!)

## Conclusions
Based on this, our current recommendation is this particular USB, which is the cheapest yet leads to a performance above LENA's:
[MP power @ Clé USB Numérique Enregistreur Flash Memory Stick Voice Dictaphone Recorder 8Go 8Gb 8 Go](https://www.amazon.fr/Num%C3%A9rique-Enregistreur-Memory-Dictaphone-Recorder/dp/B01AXR1N4Q/ref=sr_1_12?__mk_fr_FR=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2LNSR4XIR56WK&keywords=enregistreur+usb+encryption&qid=1652110519&sprefix=enregistreur+usb+encryption%2Caps%2C42&sr=8-12)

If you want to do even better, you can get this one: [Enregistreur Vocal 16 Go, Enregistreur Micro Discret Numérique Activation Vocale, Dictaphone Portable Rechargeable par USB MP3 Player pour Cours, Réunions et Entretiens](https://www.amazon.fr/dp/B08574C6WT?ref_=cm_sw_r_cp_ud_dp_8HDZ9HH785XJWGGGHAKH)