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Acoustics

Reducing noise in and between functional spaces.

Managing Impact Energy

A falling object has kinetic energy. When the object hits the floor, that kinetic energy gets distributed to many places: back to the object (bounce), into the room (impact sound), to the room below (impact sound), to the floor (heat).

Ecore’s products are all about managing where that energy goes. In acoustics, we typically care about the impact sound in the room where the object hits and in the adjacent rooms, especially the room below.

Ecore engineered surfaces can significantly reduce noise from heavy weight impacts, both in the space where they occur, and in adjacent spaces.

Types of

Impact Sound

The energy of a falling object depends on its mass and how far it falls. The falling objects could be footsteps on a treadmill, someone jumping off a box, or a dropped dumbbell.

Ecore’s products are designed to manage this energy. The best products to use, and the ways they’re tested, depend on the amount of energy and how we want to manage it. ​The energy created from the impact has two general transmission paths.

1. In-room Impact Noise — sound level in room where the impact occurs
2. Transmitted Impact Noise — sound level in adjacent room, typically below impact

1. In-room Impact Noise

2. Transmitted Impact Noise

Transmitted impact noise is typically measured in the room below where the impact occurs.​ The tests most commonly referred to for impact noise are the Impact Insulation Class (IIC) and the Delta Impact Insulation Class (ΔIIC). These tests only address the impact sound transmission to the room below the impact.​ In addition, the tests are designed to address footfall noise and include the entire floor/ceiling structure (see right), not just the flooring or underlayment.​​​

Ecore's range of products provides unique solutions that significantly reduce impact noise while also providing the safety and ergonomic performance necessary for a wide range of uses.

IIC test doesn’t represent Heavy Weight Impacts

The Facts Behind

Acoustic Performance

IIC ratings are a helpful reference for residences and other uses where footsteps are the primary concern for impact sound, but IIC ratings don’t apply to noise from heavy weight impacts in gyms.

The tapping machine used in IIC and ΔIIC tests has 1.1-lb. weights dropped from 1.6 in. These impacts are not nearly enough to represent the energy from 35-lb. dumbbells and kettlebells dropped from one or two feet, or 250-lb. barbells dropped from five or six feet high.

Our Committment

Ecore is committed to providing the test data and support needed to choose the right materials for your noise issues. That includes an INCE Board certified acoustical engineer.

Ecore has hundreds of laboratory acoustic tests and is involved in research and standards development through organizations like ASTM, the Acoustical Society of America (ASA), and the Institute of Noise Control Engineering (INCE).

See below for some of our heavy weight impact testing data.

Results

Ecore Athletic surfaces performed with:

  • A 16-lb. shot being dropped from 39-3/8" (1m) high
  • A 35-lb. kettlebell being dropped from 18" (0.457m) high
  • A 100-lb. plate weight being dropped from 18" (0.457m) high

Testing Data

The following table provides a summary of some of the overall acoustical performance attributes for our products. Although we’ve stated above that the IIC and ΔIIC ratings don’t apply to heavy weight impacts, we’ve included them here because they still apply to footsteps from activities like group exercise classes.

Because at Ecore we believe less noise is MORE.

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