PHYSICS 10 SCIENCE · 2026–27 · C · Constructed responses · QUESTION 13.4 · EM p. 60–61

Why do men’s voices sound deeper than women’s or children’s at the same intensity? Explain using the relationship between frequency and pitch.

یکساں شدت پر مردوں کی آواز عموماً عورتوں یا بچوں سے بھاری کیوں ہوتی ہے؟ تعدد اور پچ کے تعلق سے وضاحت کریں۔

Solution & explanation

Longer, heavier vocal folds usually vibrate at a lower fundamental frequency, producing lower pitch. Intensity and pitch are different properties; individual voices vary.

Independent study answer. Original textbook ↗ · English-medium printed page 60–61.