They have to relearn the task to how a 'lefty' or a 'righty' might do it. The XL-30 phone has both incoming and outgoing amplification. It can provide 15 decibels of amplification in both directions so people with soft voices don't have to strain to be heard. Two converters would cause the switch to malfunction. Voice activation usually refers to when a product does something in response to a voice command.
Voice recognition is a major component of voice activation.
This component is improving rapidly with new computer chips that can hold more information and perform more rapid matches between the spoken word and what 'knowledge' the chip holds. The development of this technology is difficult and expensive. We believe that the cellular phone industry will drive the technology further and faster than it has been developing. This will happen in response to the legislature pending in several states around the use of cellular phones while driving. The potential audience is huge and the financial stakes are very high.