New Delhi: Police personnel stop commuters to cross Delhi-Gurugram border after it was sealed by Haryana Government due to surge in COVID-19 cases, during the ongoing nationwide lockdown, in New Delhi, Friday, May 01, 2020. The border has been closed from 10 AM on Friday and will remain shut till further orders. (PTI Photo/Arun Sharma)
Bikaner: A volunteer serves food among needy people, during the ongoing COVID-19 lockdown, in Bikaner, Friday, May 01, 2020. (PTI Photo)
Mathura: A man with his wife on a cart rides past a mural, during the ongoing COVID-19 lockdown, in Mathura, Friday, May 01, 2020. (PTI Photo)
Patna: Dark clouds hover over the sky on Ganga River, during a nationwide lockdown to curb the spread of coronavirus, in Patna, Friday, May 01, 2020. (PTI Photo)
Guwahati: A labourer carrying goods walks past a mural, during the nationwide lockdown in the wake of coronavirus pandemic, in Guwahati, Friday, May 01, 2020. (PTI Photo)
Ajmer: An artist paints graffiti on COVID-19 on a street to spread awareness, during a nationwide lockdown in the wake of coronavirus pandemic, Ajmer, Friday, May 01, 2020. (PTI Photo)
Ahmedabad: Horse mounted police personnel patrol a street during the nationwide lockdown, in wake of the coronavirus pandemic, in Ahmedabad, Thursday, April 30, 2020. (PTI Photo)
New Delhi: A Muslim family break their Ramzan fast with an iftar meal just after sunset at their home, during the nationwide lockdown in wake of the coronavirus pandemic, at Turkman Gate, in New Delhi, Thursday, April 30, 2020. (PTI Photo/Manvender Vashist)
Amritsar: An elderly man sells toy balls during ongoing COVID-19 lockdown, on the outskirts of Amritsar, Thursday, April 30, 2020. (PTI Photo)
Prayagraj: UPSRTC drivers sleep on the floor after bringing back stranded workers from Madhya Pradesh, during ongoing COVID-19 lockdown in Prayagraj, Thursday, April 30, 2020. (PTI Photo)
Prayagraj: Stranded workers brought from Madhya Pradesh wait at a quarantine centre to board buses for their native places, during ongoing COVID-19 lockdown in Prayagraj, Thursday, April 30, 2020. (PTI Photo)
Chennai: A photographer checks noise level Poonamallee High Road, near Chennai Central Railway Station at 10:17 AM, amid the ongoing COVID-19 lockdown, in Chennai, Wednesday, April 29, 2020. Noise levels in our cities have never been as low as they have been in the current lockdown. PTI photographers across the country used some basic mobile phone apps to check sound level at city landmarks during office rush hour, that were busy and hence noisy not so long back. Some of our public places were nearly as quiet as a library, busy crossings having noise levels akin to conversation in a restaurant. Decibel or dB, is a measure of sound. On an average, a whisper can be 15 dB, a library 40 dB, normal conversation 60 dB, loud music indoors 70dB, car horn 110 dB, a rock concert 120 dB, a firecracker 140 dB, and a jet take off (at 25 m) as much as 150 db. Anything above 70 dB is considered annoying and above 80 dB to cause damage depending on level of exposure. Noise is known to have an impact on our health, causing stress, lowering of immunity, sleep disorders and even heart ailments and high blood pressure on prolonged exposure. (PTI Photo/R Senthil Kumar)
