"To use the ocean wave analogy an analog signal's amplitude is like the height of a wave rolling in onto the beach. The frequency of an analog signal can be compared to how fast the waves roll in. Wavelength can be compared to the distance between one wave and the next wave. Wavelength is measured as the distance between the peak of one wave and the next."
"AM means amplitude modulation and FM means frequency modulation. Think of it as amplitude is like strength and frequency is like style."
"Signals that are based on amplitude modulation (strength) are more susceptible to noise (static) because the signal strength can be affected by other factors, and it's harder to filter that static out.
Signals based on frequency (style) are less susceptible to noise because their "strength" may be affected but not their "style", and it's easier to filter out the noise.
Strength-based signals can go further but they lack style (quality), whereas style-based signals can't go as far but they retain their quality."
"So if you didn't jump as much that would be a 1 , if you jumped a little bit higher that would be a 2 and if you really gave it all you've got that would be a 3. That way billy could just read the height or amplitude of your jump and guess what number you're trying to signal to him." The link contrast the differences between FM and AM radio signals...
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.