New Materials

What is the mass law in soundproofing? Explaining the basic principles of transmission loss (sound insulation performance)

The law of mass, which states that "the heavier the material, the more sound it blocks," is one of the most important concepts when considering sound insulation performance. This article introduces the mechanism of the mass law, its relationship with transmission loss, and comparison data with actual soundproofing panels, and explains the points to avoid mistakes in the field in an easy-to-understand manner.

New Materials

Masking Phenomena - A Complete Guide

Have you ever been conversing with someone on a station platform when the sound of a passing train makes it difficult to hear their voice? This phenomenon is called "masking" when one sound is made harder to hear by another sound, or is completely lost.

New Materials

Same "wave" but different "noise" and "vibration

Noise and vibration are often overlooked sources of stress in our daily lives. This article will focus on how noise and vibration differ and how they affect our senses, explaining the differences in an easy-to-understand manner.

About equipment seismic isolation - Horizontal and vertical seismic isolation mechanisms 

This is an easy-to-understand explanation of "equipment seismic isolation," which protects important facilities and equipment from seismic shaking. The features of horizontal and vertical seismic isolation are explained in an easy-to-understand manner.

Thorough comparison of the differences between seismic resistance, vibration control, and seismic isolation! How to choose between 3 earthquake-resistant construction methods - A complete guide!

This is an illustration of seismic/seismic control/seismic isolation, technologies to protect your valuable things from earthquakes. If you are unclear about the difference between the terms, this is a must-see.

What is Attenuation - A Complete Guide

One of the basic concepts of vibration control is the concept of increasing damping. This section explains what damping is and how to increase damping.

Fundamentals of Noise Control: Sound Absorption and Sound Insulation - A Complete Guide

The most basic methods of noise control, sound absorption and sound insulation, are explained in an easy-to-understand manner...

Evaluation Methods for Environmental Vibration (Vertical) - A Complete Guide

Environmental vibration evaluation is performed by analyzing the acceleration data of vibration recorded in measurements and then comparing it to various evaluation criteria. There are several evaluation criteria and methods, which are used depending on the application and object. Some typical examples are introduced below.

What is Frequency? The Basics of Frequency in Sound and Vibration and Mapping Explained

Earthquake tremors, fitness-related vibration problems, anxious footsteps upstairs, beautiful piano music... these can be categorized by a range of "frequencies"...

What do you do to prevent vibration of machinery? ~Vibration Isolation and Elimination in Factories~.

Very Basic Knowledge about Vibration - The Meaning and Reference of Vibration Levels

Explains the difference between vibration acceleration levels and vibration levels. Includes a reference table comparing vibration level values to the way the shaking is felt and the conditions inside the building....

Introduction to Vibration Damping (1): What is Vibration Damping and Vibration Control Devices - A Complete Guide

What is vibration (seismic) control? Vibration and earthquake countermeasures using vibration control technology are used in...

Introduction to Vibration Damping (2): Effective Use of Vibration Damping Devices - A Complete Guide

Life-threatening major earthquakes, uncomfortable floor shaking, noisy noise caused by vibration.... There are many vibration (shaking) problems around us, but in what cases is vibration control (seismic damping) effective?...

Introduction to Vibration Damping (3): Vibration Damping Devices This and That - A Complete Guide

There are several types of vibration control devices. Vibration (vibration) dampers, as typified by oil dampers, mass dampers that use the reaction force of weights, and mass dampers are also classified as TMD (Tuned-Mass-Damper) and AMD (Active-Mass-Damper). What are the characteristics of each...

Trivia] Basic Knowledge of Vibration Suppression - What is the difference between "anti-vibration," "vibration isolation," and "vibration suppression"? ～Vibration Isolation

Vibration Isolation/Vibration Isolation/Vibration Damping... Similar terms but different methods. At Yakumo, we distinguish between these...

Environmental Vibration Effects and Countermeasures - A Complete Guide

Environmental vibration" occurs around us on a daily basis. What exactly is environmental vibration? What kind of problems does it cause? And what can we do about it?　Let us explain in simple terms...

Very basic knowledge about noise - Meaning and standard of noise level

Explanation of noise levels and A characteristics. There is a reference table comparing noise level values with familiar environments and locations...

What are elastic waves? ~The transmission of sound and vibration~.

The word "elastic waves" always appears in textbooks dealing with vibration and sound. There is an illustrated explanation...

What is airborne and solid propagation sound? What is the difference between them?

I'm having trouble with the noise from the kids in the same apartment..." Is it voices? Or footsteps? The same noise can be divided into two types depending on how it is transmitted, and the countermeasures to deal with it are completely different. Here are some examples to illustrate the difference...

What kind of unit is dB (decibel)?

The dB (decibel) always comes up in vibration and sound issues. It is a unit that we often hear about but are not quite sure what it is. Here is a brief summary...

What is Wind Sway? Effects and Examples of Countermeasures in Mid-rise and High-rise Buildings

Many people think of earthquakes as a cause of building swaying, but wind can also cause swaying...

What is Vibration Isolation? Machine vibration should be addressed at the source.

There are a variety of vibration issues that result from vibrations generated by factory machinery. This section describes vibration isolation, an effective countermeasure against machine vibration....

Causes of Vibration - A Complete Guide

All around us, there are various vibrations that adversely affect the comfort and livability of our lives. What causes these vibrations and what are their characteristics?

The difference between "horizontal shaking" and "vertical shaking"-a complete guide

The vibrations we feel inside a building can be divided into two main types of shaking. The horizontal (side to side) or vertical (up and down) shaking...

Fundamentals of Vibration and Noise Analysis (2)FFT Analysis - A Complete Guide

Tidbits of Knowledge In the previous article, Basics of Vibration Analysis (1), octave analysis was explained. This time, we summarized FFT analysis, another typical frequency analysis method, in an easy-to-understand manner....

What is Octave Analysis? -A Complete Guide - Basics of Vibration and Noise Analysis (1)

Octave analysis is often used to evaluate vibration and sound. What is an octave anyway? What is octave analysis? This presentation will explain in an easy-to-understand manner...

Resonance" - a phenomenon of increased shaking - a comprehensive guide

Vibrations from walking, traffic, wind, and other factors sometimes cause floors and buildings to shake significantly. This is often caused by a phenomenon called "resonance. Here is a simple explanation of what this phenomenon is...

What kind of sound is solid-state sound (sound of solid propagation)? How does it differ from airborne sound (airborne sound)?

Have you ever heard of the term solid-state sound? It is officially called solid propagation (propagation) sound, but it may not be well known to the general public....