medical scanning technologies such as magnetic resonance imaging and computed tomography have allowed scientists to examine living human vocal tracts at work speaking , singing or even beatboxing . such scans have also helped researchers generate digital models and -d-printed replicas of these body parts...
/sounders, including internal sirens/sounders in panels, are designed to emit very loud sounds. these sounds can cause hearing damage to persons either in close proximity to the siren/sounder when activated or exposed to such sounds over longer periods of time. purchased products may contain small parts...