A Very Loud Train Whistle Has an Acoustic Power Output

question 11

Multiple Choice

A very loud train whistle has an acoustic power output of 80 W. If the sound energy spreads out spherically, what is the intensity level in dB at a distance of 100 meters from the train? (I₀ = 10 ^{- 12} W/m²)

• A) 78.3 dB
• B) 88.0 dB
• C) 92.8 dB
• D) 95.0 dB

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Definitions:

Embedded LANs

Local Area Networks integrated within a larger system, specially designed to support connectivity and communication for embedded systems.

LANs

Networks that connect computers and other devices in a localized area, facilitating communication and resource sharing within a small to medium geographical location.

PANs

Personal Area Networks, a network of personal devices such as computers, smartphones, and tablets connected over a short distance.

Global Internet

Global Internet refers to the worldwide, publicly accessible network of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP).