The Grunts of Frek (a Dutch Chimp) in 2010 (audio) Cell Press Share Print E-Mail Loading audio... Caption In 2010, Frek (a Dutch chimp) has high pitched grunts (sound file 1) compared to Lucy (an Edinburgh chimp). Credit Watson et al. Usage Restrictions Credit Required. 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.