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Mean difference (dB) between various smartphones, running the SoundMeter application, and a SLM stratified by device and microphone.
| Device | Microphone | |||
|---|---|---|---|---|
|
| ||||
| iMM-6 | Internal | i436 | ||
| iPhone 4A | Mean | 24.99 | ||
| SD | 0.12 | |||
| N | 54 | |||
| iPhone 4S | Mean | -0.11 | -1.09 | 0.50 |
| SD | 0.091 | 4.08 | 0.085 | |
| N | 54 | 54 | 54 | |
| iPhone 5S | Mean | 0.02 | 1.76 | 0.82 |
| SD | 0.08 | 1.39 | 0.082 | |
| N | 54 | 54 | 54 | |
| iPod 5G | Mean | -0.55 | 2.78 | -0.01 |
| SD | 0.09 | 0.16 | 0.07 | |
| N | 54 | 54 | 54 | |
The iPhone 4 was not compatible with the external microphones
