Utilizing gammatone filter coefficient to improve human mouth-click signal detection using a multi-phase correlation process by Saleh, Nur Luqman, Sali, Aduwati, Abdullah, Raja Syamsul Azmir Raja, Ahmad, Sharifah M. Syed, Liew, Jiun Terng, Hashim, Fazirulhisyam, Abdullah, Fairuz, Rashid, Nur Emileen Abdul