A mobile telecommunication device can include voice signal monitoring. A characteristic of a signal produced in the telecommunication device can be monitored that is directly or indirectly indicative of a volume of a user's voice spoken into the device. A comparator can be provided for comparing the characteristic or characteristics to one or more threshold values. The comparator can be comprised of electronic circuitry, software or a combination of the two. In any case, an alerting system is provided that is responsive to the output of the comparator, for automatically alerting the user of the device when the characteristic is outside a desired range.