The APP consists of 3 levels – PRACTISING, CHALLENGING and DIFFICULT. Each level consists of 5 modules, with 10 Pairs of Words (PoW) per module.
The APP is available in many languages & accents including,
Each accent includes one female and one male voice.
To ensure appropriate listening conditions for each word recorded are met, techniques common in the audio and video industry were applied. Loudness normalization procedures were used, and each word recorded was adjusted at a specific Loudness Unit Full Scale (LUFS) level to combat varying loudness when listening to the various languages & accents of female and male voices.
In CHALLENGING and DIFFICULT levels, there is the opportunity to complete modules with concurrent BACKGROUND NOISE. This is to replicate real-world conditions and will be especially helpful for those with hearing loss or neurological injury.
15 different BACKGROUND NOISE conditions are included. There is also the option to upload one preferred BACKGROUND NOISE of choice in MP3 format.
The APP can be used with live sound, or through Direct Audio Input (such as a Bluetooth connection to earphones, or directly to hearing assisted listening technology). This feature allows those who use the APP to practise without disturbing others around them.
Recent generations of hearing aids, hearing implants or hearing assisted listening devices, have direct Bluetooth connection. This feature is particularly useful for those with Single Sided Deafness who are practising with hearing technology on their newly implanted ear.
When using live sound, the APP measures AMBIENT NOISE, i.e. the AMBIENT NOISE present around the listener. If AMBIENT NOISE is considered too loud, the APP will advise the listener to move.
The APP includes a measurement of COMFORT LEVEL. During this measurement the sentence “We are now testing your comfort level, please adjust the bar to the left for quiet or the right for loud until you can hear the voice easily” is played.
This feature ensures that while working with live sound or DAI, the loudness of voices is at the optimal level.
In CHALLENGING and DIFFICULT when using BACKGROUND NOISE, there are 6 Levels of predefined background noises available:
- Very Soft (app. SNR +20dB)
- Soft (app. SNR +15dB)
- Medium (app. SNR +10dB)
- Loud (app. SNR +5dB)
- Very Loud (app. SNR 0dB)
- Extreme (app. SNR -5dB)
These are set by a calculation of SIGNAL (voice) to NOISE (background noise) RATIO, in short SNR.
The SIGNAL in the APP are the female & male voices of the different Languages & Accents. The NOISE in the APP is the 15 different and one optional BACKGROUND NOISE.
For better understanding, the SIGNAL to NOISE RATIO or SNR is calculated
Example 1: the voice speaks at 60dB (SIGNAL) and the air-conditioning sound in the background is at 40dB (NOISE). 60dB minus 40dB: SNR is +20dB
Example 2: the voice speaks at 50dB (SIGNAL) and the air-conditioning sound in the background is at 55dB (NOISE). 50dB minus 55dB: SNR is -5dB