GATE Overflow for GATE ESE - Recent questions in Noise Pollution

GATE ES 2026 | Question: 37

Mon, 23 Feb 2026 13:14:36 +0000

The sound level measured at various locations in an urban area is given in the table.

The average sound level for that area is $\_\_\_\_$ dBA (rounded off to two decimal places).

$$\begin{array}{|l|l|l|l|l|}
\hline
\textbf{Location} & A & B & C & D \\
\hline
\begin{array}{l}
\text{Sound level} \\
(\text{dBA})
\end{array}
& 40 & 55 & 65 & 75 \\
\hline
\end{array}$$

GATE ES 2025 | Question: 30

Thu, 06 Mar 2025 16:21:36 +0000

Consider the following statements

Sound pressure changes with distance from the source
Sound power is a property of the source
Sound intensity is sound power per unit volume

Choose the correct option from the following

(i), (ii), and (iii) are correct
only (i) and (ii) are correct
only (i) and (iii) are correct
only (ii) and (iii) are correct

GATE ES 2024 | Question: 48

Mon, 19 Feb 2024 10:24:05 +0000

Two sources of noise, adjacent to each other in a room, have sound pressure levels of $30$ and $40$ decibel $\text{(dB)}$. The combined sound pressure level in the room is ________ $\mathrm{dB}$ $\text{(rounded off to $2$ decimal places)}$.

Use reference sound pressure as $20 \mu \mathrm{Pa}$.

GATE ES 2021 | Question: 10

Tue, 14 Mar 2023 03:44:36 +0000

In the context of noise pollution, SPL is the sound pressure level in decibels (dB). The relationship between SPL, the root mean square $\text{(rms)}$ sound pressure $p$ $\text {,and the reference (hearing threshold) pressure } p_{0} \text { is }$ expressed as ___________.

$\mathrm{SPL}=20 \times \log _{10} \frac{p}{p_{0}}$
$\mathrm{SPL}=20 \times \log _{10} \frac{p_{0}}{p}$
$\mathrm{SPL}=20-\log _{10} \frac{p}{p_{0}}$
$\mathrm{SPL}=20+\log _{10} \frac{p}{p_{0}}$

GATE ES 2022 | Question: 32

Fri, 17 Feb 2023 07:05:48 +0000

A relatively calm room has background sound power level (SPL) of 30 decibels (dB). A television and a radio with SPL of $80 \mathrm{~dB}$ and $70 \mathrm{~dB}$, respectively, started operating simultaneously in this room. Given the reference sound power is $10^{-12}$ Watts, what will be the resulting SPL in the room, assuming all the sources operate independently?

$180.0 \mathrm{~dB}$
$80.4 \mathrm{~dB}$
$82.4 \mathrm{~dB}$
$150.0 \mathrm{~dB}$