Phoenix Specification
| Toy Test Mode | |
|---|---|
| Sampling frequency | 32 kHz |
| Speech memory | 4 Mbit |
| Coding method | 4 bit ADPCM |
| Accuracy | 1 dB |
| Maximum level | 72 dB |
| Word list | McCormick Toy Test |
| Algorithm | Scoring Algorithm Institute of Hearing Research, MRC |
| Maximum number of reversals | 6 |
| Minimum number of toys selected | 2 |
| Threshold convergence | 71% |
| Step size (speech in quiet) | 12dB homing in, 6 dB test |
| Step size (speech in noise) | 6dB homing in, 3dB test |
| Speech test noise | Pink noise max freq 15kHz |
| Calibration noise | 1 kHz narrow band noise |
| Warble Tone Mode | |
|---|---|
| Warble tone frequencies | 250Hz, 500Hz, 1kHz, 2kHz, 3kHz, 4kHz, 5kHz |
| Modulation depth | 10% |
| Modulation rate | 10 Hz |
| Warble tone step size | 1, 2, 5, 10 dB |
| Maximum level | 72 dB SPL |
| Minimum level | 12 dB SPL |
| Warble tone calibration | dB(a) and dB(spl) |
