"Install It in My Home Too"... Lotte Construction Develops Floor Impact Noise Reduction Device

A Device Hidden Inside the Ceiling
Countering Vibrations with Vibrations
Applicable to Both New and Existing Buildings
Commercialization Targeted for the Second Half of This Year

On June 18, Lotte Construction announced that it has developed a floor impact noise reduction technology applying the concept of "noise canceling" (elimination of external noise) in collaboration with Saeren Acoustics, a noise control specialist. This marks the first time a domestic construction company has advanced an Active Vibration Control (AVC) system to the stage of commercialization.

The two companies began developing a device in 2023 that detects and cancels vibrations in real time, and are preparing for full-scale on-site testing in the second half of this year. The active system automates the entire process from noise detection to cancellation and can be installed even in existing apartment buildings.

Lotte Construction and Saeren Acoustics have recently filed four joint patents related to the installation and configuration methods of the noise reduction device based on this technology. Final performance verification is currently underway at institutions such as the Korea Conformity Laboratories (KCL) and the LH Housing Performance Research and Development Center.

Comparison of the Principle of Floor Impact Noise Before and After Applying Vibration Control Device (Muter). Provided by Lotte Construction

This system consists of a vibration control device called "Muter," vibration sensors, and a signal processing unit. It is installed underneath the ceiling slab. When the sensor detects impact vibrations from the floor above, it converts them into electrical signals and sends them to the Muter, which then generates vibrations in the opposite direction to reduce the noise.

Experiments have shown that this device can reduce unpleasant low-frequency (below 100Hz) floor impact noise by about 3dB. Lotte Construction plans to further verify the noise reduction performance and stability through tests in the second half of the year before moving to commercialization. Demand is also expected to grow as the system can be applied to remodeled apartments and study spaces for students.

Seok Wonkyun, head of the Lotte Construction Technology Research Institute, said, "We will continue to make efforts to enhance customer satisfaction through proactive development and commercialization of new technologies to solve the problem of floor impact noise."

Kim Dongjun, CEO of Saeren Acoustics, also commented, "We expect that 'Muter' will fundamentally change the residential and living environment of residents by controlling floor impact noise."

This content was produced with the assistance of AI translation services.