How much soundproofing is needed to avoid disturbing the neighbors? I will introduce it using a graph.
The "D value" is a rating defined by JIS (Japanese Industrial Standards) to evaluate sound insulation performance, with a value assigned at a center frequency of 500Hz. The values are ranked in intervals of 5, with larger numbers indicating higher sound insulation performance. To measure the D value of a specific room, it is determined by examining how much the sound (source) generated in that room has attenuated outside of the room (receiver). Our catalog also explains topics such as "the relationship between sound insulation ratings and real-life experiences" and "applicable ratings concerning the average sound pressure level difference between rooms." Please feel free to download and take a look. *For more details, please refer to the PDF materials or feel free to contact us.
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Since our establishment in September 2003 as a company that creates comfortable indoor environments, we have completed over 3,500 soundproofing projects and acoustic measurements as of April 2022. We have been involved in a wide variety of soundproofing projects, ranging from soundproofing for private homes such as piano rooms, drum rooms, and home theaters, to professional-grade soundproofing for rehearsal studios, dance studios, and live houses. Customer Voices https://www.soundzone.jp/voice/ Please feel free to consult us if you have any requests.