The closer you are to the source of the radio waves, the less sensitivity will be needed in the receiver, and less audio gain you will need in your reproduction

The closer you are to the source of the radio waves, the less sensitivity will be needed in the receiver, and less audio gain you will need in your reproduction device. And the less efficiency you will need in your speaker, aka transducer. At these conditions there is also no more need for user-supplied power for the audio output to become audible, so no electronic amplification is needed. As you get closer to the source the need for a carefully crafted, somewhat complex, receiver circuit will diminish, and when there is only one audio program being broadcast on a single radio frequency, no need to discriminate between different frequencies. In an electronic radio, after the single radio frequency channel has been selected, then the radio frequencies are filtered out before electronic gain is applied to the audio alone. Otherwise audio power would be wasted amplifying radio frequencies that are not audible. The hot dog emulates all of these requirements, except for the receiver sensitivity that would be needed to respond very strongly from a distance. No noticeable demodulation until it touches the source directly. Then as a single-component device, a low-efficiency transducer, it conducts the full undemodulated RF power. Its frequency response as a transducer is probably not even as high as human hearing can go, and people can not hear any RF being reproduced anyway, so all you hear is the audio. Plus when it comes to hot dog conductivity, who could forget this futuristic home appliance from the 1960's: Amy demonstrates the Presto Hot Dogger https://www.youtube.com/watch?v=LMbQmp7yC-Y https://www.youtube.com/watch?v=LMbQmp7yC-Y