Question | Answer |
SSPL | Frequency response at full volume with an input of 90dB |
OSPL90 | Output SPL with input of 90dB at full volume |
Maximum Gain | Gain of hearing aid measured at full volume with an input of 50dB |
Gain at Reference Test Frequency | Maximum gain measured at the reference test frequency |
Reference Test Gain | Gain measured at a simulated user setting with an input of 60dB |
Harmonic Distortion | Total harmonic Distortion measured at the reference test gain at a variety of frequencies |
Input Noise | Internal noise of the hearing aid with no input signal |
Battery Current | Amount of current used by the battery as measured with the battery pill |
Induction Coil Sensitivity | Signal strength of the induction coil at full volume with the hearing aid moved to achieve maximum response |
AGC Knee Point | Measured using an input output function (point at which compression ratio/gradient changes |
AGC Attack and Release Times | Time taken for compression to be start and stop where a loud sound is applied |
Frequency Response | Gain – frequency response at the reference test gain |
Input - Output Curves | Measured at one frequency with different input levels, output levels are measured and plotted to measure gain at each level |
Non - Standard test using composite signals (2) | Gain frequency response curve at any input level
Output frequency response curve at any input level |
Non - Standard test using pure tones (4) | Distortion frequency curves
Input output curves
Gain frequency response curve at any input level
Output frequency response curve at any input level |