Identify the correct sequence of average noise levels in increasing order of their magnitude from different sources.

[A] City Street corner

[B] Conversational speech

[C] Highway

[D] Aircraft noise during take off

[E] Typical office

Choose the correct answer from the options given below:

The correct option is (E), (B), (A), (C), (D).

To determine the correct sequence of average noise levels in increasing order of their magnitude (from quietest to loudest), we can analyze the typical sound pressure levels measured in decibels (dBA) for each source:
1. [E] Typical office: A typical office environment has an average noise level of about 50 to 60 dBA, representing a relatively quiet indoor setting.
2. [B] Conversational speech: Normal human conversation at a distance of about 1 meter typically averages around 60 to 65 dBA.
3. [A] City Street corner: A busy city street corner has a higher noise level due to urban activities and ambient traffic, averaging around 70 to 80 dBA.
4. [C] Highway: Heavy highway traffic noise, especially when measured close to the road, typically ranges between 80 to 90 dBA.
5. [D] Aircraft noise during take off: An aircraft during takeoff is one of the loudest common sources of noise, reaching levels of 120 to 140 dBA or more near the source, which can cause immediate discomfort or hearing damage.

Comparing these values, the increasing order of average noise levels is:
Typical office (E) ⇒ Conversational speech (B) ⇒ City Street corner (A) ⇒ Highway (C) ⇒ Aircraft noise during take off (D).

Therefore, the correct sequence is (E), (B), (A), (C), (D).