Surabaya. East Java has introduced new restrictions on the use of high-powered “sound horeg” systems, a form of mobile street entertainment often criticized for blasting music at ear-splitting volumes late into the night.

Governor Khofifah Indar Parawansa said the rules, issued in a joint circular with the regional police and military commanders on Aug. 6, do not amount to an outright ban but set strict limits on noise levels, locations, and times for such events.

“Loudspeakers can still be used, but within clear boundaries that we have agreed upon together,” Khofifah said after a provincial parliament session on Monday. She noted that the guidelines were developed in consultation with health experts and the Indonesian Ulema Council (MUI).

Under the circular, stationary sound systems are capped at 120 decibels, while mobile units used in parades or protests are limited to 85 decibels. Sound systems must be switched off near places of worship during services, as well as around hospitals, schools, and ambulances. Vehicles carrying equipment must pass roadworthiness checks, and organizers must obtain police permits.

The rules also prohibit events linked to alcohol, drugs, pornography, weapons, or other illegal activities and require organizers to take responsibility for any injuries, property damage, or public disturbances. Violations may lead to events being shut down and legal action.

The move follows growing complaints from residents and community leaders, particularly in tourist areas like Bromo Tengger Semeru National Park, where visitors and locals have been disturbed by booming bass from nearby events.

The MUI in Blitar Regency has condemned the rise of “sound horeg,” likening the atmosphere to a nightclub relocated to residential streets, with mixed-gender dancing, alcohol consumption, and vibrations that can damage buildings.

Health experts warn that prolonged exposure to such noise can cause hearing loss, sleep disruption, stress, headaches, reduced concentration, and mental health problems.

Still, some experts have criticized the policy. Public policy analyst Alie Zainal from Malang’s School of Public Administration said the rules were not based on solid evidence and failed to address real conditions. He argued that the 120-decibel limit exceeds safe thresholds and that enforcement will determine the policy’s success.

“Without firm action from the police, these guidelines will be meaningless,” Alie concluded.

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