Do You Cringe With Sound of Chalk Against a Blackboard?

Researchers conducted a study of the human brain to find out why certain sounds are unpleasant and make us cringe.

Some of those sounds are nails scratching on a blackboard, screech of a knife against a glass bottle, which we are unable to take and just want the noise to stop.

Study Reveals That Hearing Brains are 'Deaf' to Disappearance of Sounds
According to a study, our brains are better at hearing new and approaching sounds than detecting when a sound disappears.

The study showed that such sounds were found to be really unpleasant.

The MRI scans conducted while subjects heard these noises showed that such unpleasant noises increased blood flow in the brain's auditory cortex.

This area processes sounds as well as activates the amygdala, the area in the brain that takes care of our emotional responses.

Sound Level 'Like a Busy Road' Around Seriously Ill Patients
A study has shown that seriously ill patients in intensive care units are being cared for in environments with sound levels more than 20 dB higher than the WHO's recommendations.

"The new finding in this study is to precisely define the loop between the auditory cortex and the amygdala," the study's co-author, Tim Griffiths, said.

Sound Waves Used by Scientists to Levitate Liquids and Improve Drug Development Process
Levitation is being used by scientists to improve the drug development process.

Source-Medindia

'lab on a Chip' Devices Brought Closer to Reality By Acoustic Cell-sorting Technique
Researchers say that a technique that uses acoustic waves to sort cells on a chip may help create miniature medical analytic devices and lead to cell phone-sized medical labs.