Noise Effect of Gamelan Jegog to the Risk of Hearing Loss among Jegog Players in Sangkaragung Village, Negara, Jembrana

Jegog is a traditional Balinese music from the region of Jembrana. It consists of several sets of instruments made of big size bamboo tubes. When being played together, the instrument produce high intensity noise. This study examine the effect of this noise to the risk of hearing loss among the players. This study was conducted in the village of Sangkaragung, Negara, Jembrana. This study used a cross sectional method, being conducted in May-June 2016. The target population is all players of Jegog. The reachable target is Jegog players in the village of Sangkaragung. The sample group is the Jegog Players, who are residents of the Sangkaragung village those have been exposed to the noise of Jegog. The control group is Sangkaragung villagers who are not Jegog players and those have not been exposed to the noise of Jegog. Samples were chosen by total random sampling, while controls were taken by simple random sampling according to predetermined inclusion and exclusion rules. Jegog produces noise in the range of 86 – 105 dB. The players have been exposed to the Jegog noise for an average of 2 hours per day or 10 hours per week. Among the 37 players in the sample group, there were 13 (35.1%) players found to have noise induced hearing loss seen in their audiogram. In the control group consisting of 37 villagers, there were only 2 (5,4%) persons found to have noise induced hearing loss. This resulted in a 7 adjusted prevalence ratio, which means that Jegog players have risk of having noise induced hearing loss 7 times higher than the control group. Statistic test gives a confidence interval 95%(1.6-31.1) with p= 0.011 (p<5). Statistically, there is a significant correlation between the noise of Jegog with the hearing loss among the players.