A Very Loud Train Whistle Has an Acoustic Power Output

question 16

Multiple Choice

A very loud train whistle has an acoustic power output of 94 W.If the sound energy spreads out spherically,what is the intensity level in dB at a distance of 95 meters from the train? (I₀ = 10−¹² W/m²)

• A) 21 dB
• B) 69 dB
• C) 89 dB
• D) 94 dB
• E) 205 dB

---

Definitions:

Low-Income Countries

Countries classified as low-income have significantly lower GDP per capita compared to the global average, often indicating limited economic development.

Malnutrition

A condition that results from eating a diet in which one or more nutrients are either not enough or are too much, leading to health problems.

World Bank

An international financial institution that provides loans and grants to the governments of poorer countries for the purpose of pursuing capital projects aimed at reducing poverty.

Economic Development Institution

Organizations, either governmental or non-governmental, focused on promoting economic development and growth by providing support, resources, and policies to stimulate economic activities.