1. Pitch and Frequency: 110's voice is heavily accented and short, with a high frequency. 110's voice has a higher pitch and frequency, and sounds sharper. In contrast, the sound of 120 is flat and short, with long spacing between the two high-frequency sounds. 120 will have a smoother pitch and frequency, with longer spacing between the two high-frequency sounds. The 119 sound, on the other hand, is described as having a sharp and lengthy accent, and the 119 sound would have a sharper and more sustained pitch.
2. Uses and associations: These three numbers are associated with different uses and associations in different contexts. 110 is the number of the police in some countries or regions and is used for emergency calls. 120 is associated with a specific function or warning tone in some electronic devices or communication systems. 119, on the other hand, is a telephone number for medical emergencies in some countries or regions, and is used for emergency medical assistance.