| Radio | Sound |
| Radio signals propagate as electromagnetic waves. | Sound propagates as acoustic waves. |
| Radio waves propagate at around 300 million meters per second in a vacuum. | Acoustic waves propagate at around 331 meters per second in dry air |
| Radio waves have frequencies in the 3 Khz to 300 Ghz band. | The human ear can detect acoustic waves in the 20 - 20 Khz frequency band. |
| Radio waves are detected by car radios, television sets, and WiFi radios. | Acoustic waves are detected by microphones and ears. |
| If you are driving and get far away from the transmitter, the radio waves may attenuate to the point where you can no longer receive the signal on your car radio. | If you walk away from someone who is speaking, the sound may attenuate to the point where you can not hear them. |
| When the power of a radio wave falls to near the sensitivity threshold of the receiver, transmission errors will occur. | If someone lowers their voice until you can barely hear them, transmission errors will occur. |
| A powerful signal from one radio may interfere with another radio transmitting at or near the same frequency. | If you are talking with a friend and a rock band starts playing, you may not be able to hear your friend. |
| If you drive into a tunnel, you may not be able to hear a distant station on your car radio. | If a friend is speaking from another room, you may not be able to hear. |
| If the power of a radio transmitter is increased, the signal can be detected from further away. | If someone talks loudly, they can be heard from further away than if they talk quietly. |
| If your radio is not tuned to the frequency a station is broadcasting on, you will not hear the station. | People can not hear the high pitched sounds dogs can hear. |