Final answer:
The spectra of audio signals on canvas are considered frequency-domain representations, focusing on the frequency, amplitude, and phase characteristics of the signals. Such representations help us analyze and manipulate signals for various applications like radio broadcasting.
Step-by-step explanation:
The spectra of two audio signals placed on canvas are considered frequency-domain representations. This is because their spectra involve analyzing the various frequencies contained in the signals. In the context of audio and electromagnetic waves, this typically involves looking at different components of a signal such as amplitude, frequency, and phase. When referring to the relationship between two signals or waves, terms like 'in phase', 'out of phase', 'same amplitude', and 'different amplitude' are used to describe their interactions. For example, if two signals are of the same frequency and are 'in phase', their peaks and troughs align, resulting in constructive interference and a signal with increased amplitude at the points where they coincide. Regarding spectra positions such as 'long-wavelength and high-frequency' or 'short-wavelength and low-frequency', these are descriptions of different parts of the electromagnetic spectrum where different types of waves exist, corresponding to their physical properties. In amplitude modulation (AM radio), the amplitude of a carrier wave is altered in accordance with the audio signal's amplitude, allowing the audio to be transmitted without changing the carrier wave's frequency.