Sound level of a person shouting at full voice A typical shout at full voice corresponds to approximately which sound level in decibels (dB)?

Introduction / Context:
Sound levels are measured on a logarithmic decibel scale, important for environmental noise control and occupational hygiene. Everyday reference points help estimate exposure severity.

Given Data / Assumptions:

• “Shouting at full voice” is a near-field vocalization, typically at 1 m reference distance.
• We seek an order-of-magnitude decibel value.

Concept / Approach:
Typical human voice levels: whisper ~30 dB, normal conversation ~60 dB, loud speech ~70 dB, shout ~80–90 dB, and rock concerts/ sirens can exceed 100 dB. Therefore, 80 dB is a representative single-number answer for a shout, suitable for MCQ contexts.

Step-by-Step Solution:

Verification / Alternative check:
Occupational noise charts commonly place loud human vocal effort in the 80–90 dB range at close distance.

Why Other Options Are Wrong:

Common Pitfalls:
Forgetting that the decibel scale is logarithmic: a 10 dB increase represents a tenfold increase in intensity and is perceived as roughly twice as loud.

Final Answer:
80