Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Maximum output in dB SPL measured with 2-cc coupler for mentioned frequencies (in Hz) played through Sennheiser CX300 earphone connected across different iPhone devices.
| Smartphone | Channel | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
|---|---|---|---|---|---|---|---|
| iPhone XR | L | 85.1 | 93.5 | 107.2 | 112.8 | 106 | 108.8 |
| R | 84.9 | 93.4 | 107.3 | 113 | 106.1 | 108.7 | |
| iPhone 10 | L | 83.4 | 94.6 | 107.8 | 113.5 | 105.7 | 108.6 |
| R | 83.5 | 94.1 | 108.1 | 113.2 | 105.8 | 108.2 | |
| iPhone 8 | L | 83.1 | 93.3 | 107.3 | 112.8 | 106.4 | 108.5 |
| R | 83.3 | 93.3 | 107.2 | 112.7 | 106.1 | 108.9 |
