Datasets on Measured Noise Levels for Kota Metropolis, India

The precision grade SPL meter “HTC SL-1350” is used for the field measurement consist of “1/2-inch microphone” and “1/3-octave filter” with the measuring level range and frequency range of 30– 130 dB, and 31.5 Hz – 8 kHz, respectively. The measurement accuracy and resolution are 1 dB and 0.1 dB, respectively. The instrument (HTC SL-1350) was calibrated before making measurements at each location. The research methodology adopted for environmental noise measurements was given in figure 5. Noise levels were recorded for day time (6:00 am – 10 pm) and night time (10:00 pm – 6:00 am) as per Indian standard time for measurement given by Central Pollution Control Board (CPCB), India.
From the observation data, noise indices such as Leq (equivalent sound pressure level, A-weighted), Lmin (minimum noise level), Lmax (maximum noise level), the exceedance percentiles (L10, L50, L90), LN (Night Noise Levels), LD (Day Noise Levels), TNI (Traffic Noise Index), LNP (Noise Pollution Level), NC (Noise Climate), and NEI (Noise Emission Index) was calculated.

高精度声压级 SPL 测量仪“HTC SL-1350”被用于现场测量，该测量仪由“半英寸麦克风”和“1/3倍频程滤波器”组成，其测量量程和频率范围分别为30至130分贝，以及31.5赫兹至8千赫兹。该仪器的测量精度和解像度分别达到1分贝和0.1分贝。在每个测量地点进行测量之前，仪器（HTC SL-1350）均已进行了校准。用于环境噪声测量的研究方法已在图5中给出。噪声水平按照印度标准时间，在白天（上午6:00至晚上10:00）和夜间（晚上10:00至上午6:00）进行记录。从观测数据中，计算了如等效声压级 Leq（A加权）、最小噪声水平 Lmin、最大噪声水平 Lmax、超过百分位数（L10、L50、L90）、夜间噪声水平 LN、白天噪声水平 LD、交通噪声指数 TNI、噪声污染水平 LNP、噪声气候 NC 以及噪声排放指数 NEI 等噪声指标。