“Acoustic foam”的意思、由来-开放百科全书

Acoustic foam is an open celled foam used for acoustic treatment. It attenuates airborne sound waves by increasing air resistance, thus reducing the amplitude of the waves.

^[1] The energy is dissipated as heat.{{cn|date=January 2017}} Acoustic foam can be made in several different colors, sizes and thickness.{{cn|date=January 2017}}

Acoustic foam can be attached to walls, ceilings, doors, and other features of a room to control noise levels, vibration, and echoes. ^[2]

Uses

The objective of acoustic foam is to improve the sound quality by removing residual sound in any space.^[4]This purpose requires strategic placement of acoustic foam panels on walls, ceiling and floors, effectively eliminating resonance within the room.^[5]

Acoustic enhancement

The objective is to enhance the properties of sound by improving speech clarity and sound quality.{{cn|date=January 2017}} For this reason, acoustic foam is often used in recording studios.{{cn|date=January 2017}} The purpose is to reduce, but not entirely eliminate, resonance within the room.{{cn|date=January 2017}} This is achieved by placing similar sized pieces of foam, often in the shape of cones or triangles, on opposite walls.{{cn|date=January 2017}}

Functionality

Acoustic foam is a lightweight material made from polyurethane foam either polyether or polyester, and also extruded melamine foam.{{cn|date=January 2017}} It is usually cut into tiles - often with pyramid or wedge shapes - which are suited to placing on the walls of a recording studio or a similar type of environment to act as a sound absorber, thus enhancing the sound quality within a room.{{cn|date=January 2017}}

Acoustic foam reduces or eliminates echoes and background noises by controlling the reverberation that sound can make by bouncing off walls.{{cn|date=January 2017}} This type of sound absorption is different from soundproofing, which is typically used to keep sound from escaping or entering a room.{{cn|date=January 2017}} Therefore, acoustic foam is installed in large rooms like churches, synagogues, concert halls.{{cn|date=January 2017}} These rooms have large, flat space and noise will certainly bounce around in the room.{{cn|date=January 2017}} These sound absorbers are used to improve the acoustics of the room, which thereby reduces noise in the room.{{cn|date=January 2017}}

Acoustic foam typically deals more with the mid and high frequencies.{{cn|date=January 2017}} To deal with lower frequencies, much thicker pieces of acoustic foam are needed; large pieces of acoustic foam are often placed in the corners of a room and are called acoustic foam corner bass traps.{{cn|date=January 2017}}

See also

References

1. ^{{Cite web|url= https://www.universalpowerconversion.com/acoustical-foam|title= Acoustical Foam|website= universalpowerconversion.com}}
2. ^{{cite web |title=Effects of egg crate foam as acoustics panel|publisher=pfa|url=http://www.partfoam.com/eggcratefoam.html}}
3. ^{{Cite web |url= https://www.auralex.com/tools/testing-data/fire-testing-data/ |title= Fire Testing Data |website= auralex.com}}
4. ^{{Cite journal|last=Chen|first=Francine Robina|date=1980|title=Acoustic characteristics and intelligibility of clear and conversational speech at the segmental level.|url=|journal=|volume=|pages=|via=Massachusetts Institute of Technology}}
5. ^{{Cite web |url= http://www.avbend.com/acoustic-treatment |title= Acoustic Treatment - Acoustic Panels |agency= Audio Visual Bend |website= avbend.com}}