In his book The Meaning of Human Existence, Pulitzer Prize-winning biologist Edward O. Wilson argues that “healthy people believe intuitively that they can hear every almost every sound. However… we walk through nature like a deaf person on the streets of New York, sensing only a few vibrations, able to interpret almost nothing.” So I hope your cat or dog is a music fan, because they are far more likely to appreciate the crisp top-end preserved in your favorite lossless audio format than you are.
A mode is like a scale: It is a collection of pitches which have a certain relationship between each other. Just like any major or minor scale, a mode has a Tonic (a point of rest) and a “Dominant” (a point of tension which needs resolution). I have put the word Dominant in quotations because in the case of modes, the dominant is not always found on the 5th degree — like in any major scale for example — but it is the degree(s) which contain the characteristic note (the note that gives a certain mode its peculiar sound) that functions as a dominant.