I'm sure you all at least once listened to the Virtual Barber shop audio clip. If not, you should immediately. As a child it fascinated me. It is a binaural audio clip originally created in 1996. It gave me chills when the barber started cutting hair. Not even for a moment I felt it's not real. But how does it work? It is due to binaural hearing. It helps our brain to detect the direction of a sound. When making binaural recordings a two track digital recording device is attached to two microphones that are mounted on a dummy head equivalent to a human head. The recordings are so realistic that some people even claimed they smell sulfur if someone strikes a match in an audio clip. If you haven't listened to a binaural audio clip now is the time to enjoy. And if you are a fan of these clips let me know the best one you listened to so far.
As we all know A/Ls is a very tough exam and you will not be able to finish it successfully by just studying.It needs practice,timing and all.So the best way to do it is do exercises and improve knowledge,i did A/Ls in physical science stream and in sinhala medium,so based on my experience i will recommend anyone to use following books.There may be books better than following list,but books below were used by me. Chemistry almost every book by hemachandra basnayaka Akabanika rasayanaya by Aruna Bandara (there are two books for inorganic chemistry,these books will help you in for the doubts you will have in doing mcqs) Akabanika rasayana pilibanda gunathmaka ha pramanathmaka wishleshanaya by Ranga gunarathna(this also will help you in mcqs) Organic chemistry by jayathilaka(this book is very good and it will help you to understand concepts in organic chemistry better) Physics Prof D.D.N balo dayas' books yanthra vidyawa by lakshaman dissanayaka(questionsin this book are
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