The environmental noise limit stipulates that KTV shall not exceed 7 decibels during the day and 6 decibels at night.

ktv is Karaoke Television. In a narrow sense, it is a place to provide karaoke audio-visual equipment and solfeggio space. In a broad sense, it means that the main business of karaoke, slow-rocking, HI rooms, background music and wine service is the casino at night.

noise is an unnecessary sound in a certain environment. Generally refers to noisy and harsh sounds. From the point of view of environmental protection, all sounds that interfere with people's normal rest, study and work, and those that interfere with people's listening are noise. Noise is a kind of sound that causes people's irritability or is too loud and harmful to human health.

Noise pollution mainly comes from transportation, vehicle horns, industrial noise, construction, social noise such as concert halls, loudspeakers, morning markets and people talking loudly.

Extended information:

According to the Standard for Sound Environmental Quality (GB396-28), the sound environmental function can be divided into the following five types according to the functional characteristics and environmental quality requirements of the area:

(1) Class sound environmental function area: refers to rehabilitation area, etc.

(2) Class 1 acoustic environment functional area: refers to the area whose main functions are residential, medical and health care, culture and education, scientific research and design, and administrative office space, which needs to be kept quiet.

(3) Class 2 acoustic environment functional area: refers to the area where commercial finance and market trade are the main functions, or where residence, commerce and industry are mixed, and it is necessary to keep the house quiet.

(4) Class 3 acoustic environment functional area: refers to the area whose main functions are industrial production, warehousing and logistics, and it is necessary to prevent industrial noise from seriously affecting the surrounding environment.

(5) Class-4 acoustic environment functional area: refers to the area within a certain distance from both sides of the traffic trunk road, which needs to prevent traffic noise from seriously affecting the surrounding environment, including Class 4a and Class 4b. Category 4a refers to the areas on both sides of expressways, first-class highways, second-class highways, urban expressways, urban trunk roads, urban secondary trunk roads, urban rail transit (ground section) and inland waterways. The areas on both sides of inland navigation crossing the urban area. Class 4b refers to the areas on both sides of the railway trunk line

Baidu Encyclopedia-environmental noise.