Hanoks Provide Acoustical Excellence for Musicians (image) Acoustical Society of America Share Print E-Mail Caption Hanoks provide acoustical excellence for musicians playing classic Korean musical instruments such as the "gayageum," which is a zither with 12 strings (left), accompanied by the beats of "jang-go," an hourglass-shaped drum (right). Credit Kim/SSU Usage Restrictions This image may be used only with appropriate caption and credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.