If this is the first time you are using the Labex Electronic larynx speech aid device, we advise you to simply start learning how to speak with the device without making any adjustments to the tone or volume. The most important thing is to locate the "sweet spot" on your neck area.
A sweet spot will allow sound to transmit through your neck tissue and your oral cavity with the most clarity. The easiest way to find your sweet spot is to place the artificial Electrolarynx on your neck at different points while you activate the power button and try to pronounce one syllable. This is done until you hear the best projection through your mouth. Finding your sweet spot is the essential and sometimes the hardest part of having quality results with your artificial larynx. While looking for a sweet spot, it is crucial that you press the unit firmly against your neck tissue, so the sound transmits through your next tissue and out your oral cavity. If you do not press it firmly, you will have a problem of sound escaping and thus making your speech too loud and unclear. If you press the electrolarynx firmly, the voice projected will sound better.
Please, keep in mind that right after radiation therapy it is possible that the skin of the neck is very thick and hard. This reduces the ability of the sound from the device to pass through the tissues of the throat and out of your mouth. This can make it difficult for you to initially find your sweet spot but the neck thickness is supposed to decrease in 7 / 14 days.