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What is soundproofing

21 Sep 16
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Soundproofing is defined as any method of reducing the ability of sound to travel between point A and point B, and is accomplished by the reduction of noise and the absorption of noise. A requirement in many professional recording studios, soundproofing is also becoming popular in residential structures, especially multi-family structures like apartments and condominiums wherein tenants share walls.

Soundproofing is defined as any method of reducing the ability of sound to travel between point A and point B, and is accomplished by the reduction of noise and the absorption of noise. A requirement in many professional recording studios, soundproofing is also becoming popular in residential structures, especially multi-family structures like apartments and condominiums wherein tenants share walls.

The basics of soundproofing

In order to understand the concept of soundproofing, you must first understand the concept of blocking sound. Specifically, there are only three ways in which sound can be blocked or noise can be reduced. These three ways are as follows: Space – The further away from a source of sound you are, the less likely it is that you will hear the sound.

Space impedes sound travel. Mass – This one is also simple. The more mass between the origin and destination of a sound wave, the less audible the sound wave will be once it reaches its destination point.

Why Use Soundproofing Floors Underlayments

21 Sep 16
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Why Use Soundproofing Floors Underlayments:

Soundproofing Floor Underlayments are premium underlayments that are available in many models and provide sound isolation between the floor covering and the sub floor. Acoustic floor underlayments are different than any other underlayments on the market today.

Each product and model has been designed, engineered and manufactured specifically around the floor covering and what the floor covering needs to maintain its integrity and warranty. Many years of research & development and testing have gone into each model and will provide years of acoustical sound reduction while maintaining the integrity and warranty of the floor.

Why Use Soundproofing Floors Underlayments:

Systems designed for maximum performance and ease of Installation
Specifically designed for each floor covering
Proven results over 100+ acoustical tests
Most underlayments are self leveling up to 1/4″ over 10 feet

Acoustical Glossary

21 Sep 16
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Glossary of Acoustic Terms and definitions for various soundproofing words, as well as detailed descriptions of soundproofing concepts.

ACOUSTICS:
The scientific study of sound, its production, transmission, and effects.

ACOUSTICAL:
The properties of a material to absorb or reflect sound (adjective), Acoustically (adverb).

ACOUSTICAL ANALYSIS:
A review of a space to determine the level of reverberation or reflected sound in the space (in seconds) influenced by the building materials used to construct the space. Also the amount of acoustical absorption required to reduce reverberation and noise.

ACOUSTICAL CONSULTANT:
A professional who is experienced in providing advice on acoustical requirements, and noise control in a variety of situations.

ACOUSTICAL ENVIRONMENT:
The acoustical characteristics of a space or room influenced by the amount of acoustical absorption, or lack of it in the space.

AIRBORNE SOUND:
Sound that reaches the point of interest by traveling through the air.

AMBIENT NOISE/SOUND:
All noise level present in a given environment, usually being a composite of sounds from many sources far and near. Traffic, HVAC, masking sound or even low-level background music can contribute to ambient level of noise or sound.

AMPLITUDE:
The nonnegative scaler measurement of a sound wave’s peak magnitude during a frequency cycle or peak pressure variation.

ARCHITECTURAL ACOUSTICS:
The control of noise in a building space to adequately support the communications function within the space and its effect on the occupants. The qualities of the building materials used to determine its character with respect to distinct hearing.

ARTICULATION CLASS (AC):
A measure of rating building elements such as acoustical ceilings and acoustical screens for speech privacy purposes. AC values increase with increasing privacy. AC has replaced Noise Isolation Class (NIC) as the accepted industry standard performance value. NIC is based on hearing sensitivity rather than discernment of actual speech, which is the primary concern in open office layouts prevalent in acoustical design work.

ARTICULATION INDEX:
A measure of speech intelligibility influenced by an acoustical environment, and rated from 0.01 to 1.00. The higher the number, the higher the intelligibility of the spoken word in a sentence from 0 to 100%.

AREA EFFECT:
Acoustical materials spaced apart can have greater absorption than the same amount of materials butted together. The increase in efficiency is due to absorption is due to more surface area on an acoustical panel, diffraction around the panels, and air space.

ASTM:
Acronym for American Society of Testing and Materials

A-WEIGHTING:
A measure of sound pressure level designed to reflect the response of the human ear, which does not respond equally to all frequencies. To describe sound in a manner representative of the human ear’s response it is necessary to reduce the effects of the low and high frequencies with respect to medium frequencies. The resultant sound level is said to be A-weighted, and the units are in decibels (dBA). The A-weighted sound level is also called the noise level.

A-WEIGHTED SOUND LEVEL:
The sound level measured with a sound level meter using A-weighting, which alters the sensitivity of the sound level meter with respect to frequency so that the sound level meter is less sensitive is less sensitive at frequencies where the ear is less sensitive; usually used in specifying permissible sound levels in buildings.

BACKGROUND NOISE:
The sum total of all unwanted residual noise generated from all direct and reflected sound sources in a space that can represent an interface to, or interfere with good listening and speech intelligibility. (Hearing impaired persons are especially victimized by background noise)

BAFFLE:
An acoustical sound absorbing unit. Normally suspended vertically in a variety of patterns to introduce absorption into a space to reduce reverberation and noise levels.

BARRIER:
Anything physical or an environment that interferes with communication or listening

BASS TRAP:
An acoustic absorber or sound baffle used mainly in sound-recording studios and home theaters to absorb sound at low frequencies less that about 100 hertz (Hz). Bass traps, like all acoustically absorptive materials, function by turning sound energy within the room into minute amounts of heat through friction.

BOOMINESS:
Low frequency reflections. In small rooms, acoustical panels with air space behind can better help control low frequency reflectivity.

CLOUD:
In acoustical industry terms, an acoustical panel suspended in a horizontal position from a ceiling or roof structure. Similar to a baffle, but in a horizontal position.

COCKTAIL PARTY EFFECT:
The Cocktail Party effect describes the ability to focus one’s listening attention on a single talker among a mixture of conversations and background noises, ignoring other conversations. This effect reveals one of the surprising abilities of our auditory system, which allows us to communicate in a noisy place, such as a cocktail party.

COINCIDENCE REGION:
The typically high frequency at which sound can pass directly through a partition due to the partition resonating at that same frequency. Speed of wave traveling through the material equals the speed if the sound (incident) wave in air.

CONSTRAINED LAYER DAMPING (CLD):
Vibrational energy is dissipated and converted into small amounts of heat as a result of the extension and compression, or shearing of a damping layer. A viscoelastic damping compound between two stiff or rigid constraining layers such as drywall or plywood. This conversion of vibration to heat reduces the resonance of the stiff layers much like placing a hand on a drum head to stop it from resonating.

CYCLE:
In acoustics, the cycle is the complete oscillation of a sound wave’s pressure above and below the atmospheric static pressure.

CYCLES PER SECOND:
The number of oscillations (cycles) that occur in the time frame of one second. (See FREQUENCY). Low frequency sounds have fewer and longer cycles than high frequency sounds.

DAMPING:
The process by which vibrations are converted into heat over time and distance.

DECIBEL (dB):
A logarithmic unit used to express the difference or magnitude of the level or power of sound intensity. It is equal to ten times the common logarithm of the ratio of the two levels. [DECI + BEL] A whisper is about 20 dB, typical conversation is between 60 – 70 dB, and the threshold of pain for the human ear is around 120 dB. Decibels are not directly related to human ear sensitivity and doubling dB does not equate to a doubling in perceived loudness since it works as a curve. 10 dB is a typical doubling or halving of perceived volume. Note that being logarithmic values, they cannot be added.

What is Architectural Acoustics

21 Sep 16
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acousticsArchitectural acoustics is the science and engineering of achieving a good sound within a building and is a branch of acoustical engineering.

Different shapes of halls directly affect how the sound behaves within them, the finishing materials used have significant effect on the acoustics too.

The combination of these two main factors will not only result in various interior designs, but endless and complicated variations of how the hall sounds.

Difference Between Airborne & Structure Borne Noise

18 Sep 16
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Airborne Noise & Structure Borne Noise

Airborne Noise is noise that is travels through the air such as speech, television, radio, etc.  Airborne noise is typically controlled by weight and mass; the heavier the floor/ceiling or interior walls are the better its ability to stop or insulate airborne noise.

Airborne noise is tested using the ASTM E413-04 test.  It is a single-number rating system that is used to compare the sound insulation of interior walls or floors tested in laboratory conditions (STC) or the actual sound isolation between different floor/rooms in the field (FSTC).

Structure Borne Noise is noise that is cause by an impact, this noise includes: walking or foot fall noise, dragging chairs, objects dropping, etc.

Structure borne noise is tested using the ASTM E492-04 test for laboratory measurements (IIC) and the ASTM E1007-04e1 test for field measurements (FIIC) using a tapping machine. Tests evaluate the impact sound-insulating performance of a floor-ceiling assembly and are also a single-number rating system. Soundproofing Floors Underlayments are used to isolate a hard surface floor form the sub floor.

Acoustic Reference Guide

21 Apr 16
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Sound is classified into two basic types:

Airborne Noise – talking, music, TV

Structure-Borne Noise – impact floor noise commonly referred to as footfall noise, dragging furniture, dog walking, etc

acoustics-guideSTC (Sound Transmission Class)

A value for evaluating the performance of interior walls and the floor/ceiling assembly to stop or insulate airborne

The higher the STC number the better the ability of the assembly to block airborne noise

Weight & mass play a major factor in the overall STC rating, the heavier the structure the higher the STC ratings will be.

 

 

acoustics-reference-guide

IIC (Impact Isolation Class)

A value for evaluating the performance of the floor/ceiling assembly from structure borne noise

Floor underlayments in general are lightweight and designed specifically for impact isolation (IIC)

The higher the number the better the performance

Weight & mass helps with low frequency performance and will help the IIC performance of an underlayment

Note: The Δ IIC is a new ASTM test that measures the improvement in decibels.Example a Δ IIC 21 would mean a 21 point improvement . The IIC tests is only tested on a 6″ concrete slab with no ceiling below.

 

Typical STC & IIC Ratings of untreated floor / ceiling assemblies

stc
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Soundproofing Floors – Jumpax Case Study

20 Apr 16
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Massachusetts Institute of Technology ( M.I.T.)

jumpax-case-studyM.I.T is a large, highly residential, research facility with a majority of enrollments in graduate and professional programs M.I.T. current and previous faculty has won eight Nobel Prizes M.I.T. More than one third of the United States’ manned spaceflights have included MIT-educated astronaut.

Project: W1 Building on the M.I.T. Campus Cambridge MA.

Scope: 80,000 sq ft of Student Housing

Requirement: Glue down vinyl & VCT requiring extensive floor preparation. The sub floor condition should be a hard, stable, and seamless surface to ensure the integrity of the vinyl. In addition, acoustical underlayment required to increase the Impact insulation classification (IIC) of the renovated floor/ceiling assembly.

Solution: Jumpax acoustical underlayment. A sound reducing, free floating, dry leveling, fast track floor preparation system by the Impacta division of All Noise Control.

MIT W1 BUILDING

jumpaxW1 building is a 100+ year old building on the MIT campus in Cambridge MA used for student and staff housing. The building has recently been renovated starting with the old interior being completely gutted from top to bottom. Due to the age of the building, the condition of the structural floor/ceiling assembly, the amount of intense floor preparation and the need for a structure-born noise acoustical underlayment system, Jumpax was the perfect fit.

It is imperative when working on a prestigious project like MIT that all parties involved work closely together to insure a successful project. The MIT project was no exception; ANC worked very closely with Miller, Dyer, Spears Architects, Shawmut Design & Construction the General Contractor and provided onsite training and support to Contract Flooring the flooring contractor/installers. The result is a highly successful completion of the MIT project.

 

Soundproofing Floors News

17 Apr 16
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Soundproofing Floors USA is a leading manufacturer of soundproofing floors underlayment materials, announced today the availability of its innovative underlayment solution, Cerazorb Soundproofing Floor Underlayment for wood flooring. Cerazorb Soundproofing underlayment is now available for floated or glue down wood flooring  offering acoustical performance of up to a 23dB decrease in an extremely lightweight system.  Read More

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Redupax: An New Innovative Fiber Based soundproofing Underlayment – Redupax Underlayment from Flooring, is a 100% recycled wood fiber based underlay that will not bounce or flex like many foams, felts, and rubber underlays—resulting in a more stable and robust sound when walked upon, and eliminating the disagreeable “hollow sound” attributed to many floated engineered hardwood and laminate floors. Read More

Definition for Soundproofing

Soundproofing term usually being used when some is trying to block noise or sound from one are to another, to accomplish that you would need a soundproof or sound blocking materials.