Final answer:
The question involves identifying the rhythmic meter of musical or poetic excerpts as duple, triple, or quadruple, and determining the beat frequencies when certain musical notes are played together. Duple meter has two beats per measure, triple meter has three, and quadruple has four. Beat frequencies result from the difference between frequencies of notes played together.
Step-by-step explanation:
The question is related to the meter of musical excerpts or poetry and the classification into types such as duple, triple, or quadruple. These terms refer to the rhythmic structure or stress patterns in music and poetry. Duple meter has two beats per measure, as in the trochee (/ x) or iamb (x /), which are common in English poetry and can be illustrated by phrases like "blue spurt" (spondee) and "The curfew tolls the knell of parting day" (iambic pentameter). In contrast, triple meter has three beats per measure, represented by the anapest (x x /) and the dactyl (/ x x), found in words like "unimpressed" and "probably". The tercet stanza with its ABA rhyme scheme exemplifies the use of triple meter in poetry. Quadruple meter, with four beats per measure, is illustrated through tetrameter lines, where you can count four feet in the rhythm.
For beat frequencies in music, when certain musical notes are played together, such as A and C (220 and 264 Hz) or D and F (297 and 352 Hz), the resulting beat frequency is the absolute difference between the frequencies of the two notes. Therefore, if A and C are played together, the beat frequency would be 44 Hz (264 - 220), and if D and F are played together, it would be 55 Hz (352 - 297).