A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SOUND-DEADENING SYSTEM
To provide a sound-deadening system that can achieve both a high ventilation characteristic and sound-proof performance, can deaden a plurality of resonance sounds, and is high in versatility without a need for designing to adapt to a tube-like member.SOLUTION: A sound-deadening system 10z has a sound-deadening device arranged in a tubular member, in which the sound-deadening device 21 is aimed at deadening a sound with a frequency of first resonance of the tubular member, and the sound-deadening device has a hollow part 30 and an opening part 32. The opening part is connected to a sound field space of first resonance of the tubular member 12 and has a conversion mechanism for converting sound energy into thermal energy arranged in the hollow part or at a position covering the opening part. Let an area of the opening part of the sound-deadening device be Sand a surface area of an inner wall of the hollow part be S, then a ratio S/Sof the area Sto the area Ssatisfies 0<40%. And, let a wavelength of a sound wave in a resonance frequency of the first resonance be λ, then a depth Lof the hollow part in an advancement direction of the sound wave in the sound-deadening device satisfies 0.011×λ
【課題】高い通気性と防音性能を両立することができ、また、複数の共鳴音を消音することができ、また、管状部材に合わせた設計が不要で汎用性の高い消音システムを提供する。【解決手段】管状部材に消音器が配置された消音システム１０ｚであって、消音器２１は、管状部材の第一共鳴の周波数の音を消音するものであり、消音器は空洞部３０および開口部３２を有する。開口部は、管状部材１２の第一共鳴の音場空間に接続されており、空洞部内又は開口部を覆う位置に、音エネルギーを熱エネルギーに変換する変換機構が配置されており、消音器の開口部の面積をＳ1、空洞部の内壁の表面積をＳdとすると、面積Ｓdに対する面積Ｓ1の割合Ｓ1/Ｓdは、０＜Ｓ1／Ｓd＜４０％を満たし、第一共鳴の共鳴周波数における音波の波長をλとすると、消音器内の音波の進行方向における空洞部の深さＬdは、０．０１１×λ＜Ｌd＜０．２５×λを満たす。【選択図】図１
SOUND-DEADENING SYSTEM
To provide a sound-deadening system that can achieve both a high ventilation characteristic and sound-proof performance, can deaden a plurality of resonance sounds, and is high in versatility without a need for designing to adapt to a tube-like member.SOLUTION: A sound-deadening system 10z has a sound-deadening device arranged in a tubular member, in which the sound-deadening device 21 is aimed at deadening a sound with a frequency of first resonance of the tubular member, and the sound-deadening device has a hollow part 30 and an opening part 32. The opening part is connected to a sound field space of first resonance of the tubular member 12 and has a conversion mechanism for converting sound energy into thermal energy arranged in the hollow part or at a position covering the opening part. Let an area of the opening part of the sound-deadening device be Sand a surface area of an inner wall of the hollow part be S, then a ratio S/Sof the area Sto the area Ssatisfies 0<40%. And, let a wavelength of a sound wave in a resonance frequency of the first resonance be λ, then a depth Lof the hollow part in an advancement direction of the sound wave in the sound-deadening device satisfies 0.011×λ
【課題】高い通気性と防音性能を両立することができ、また、複数の共鳴音を消音することができ、また、管状部材に合わせた設計が不要で汎用性の高い消音システムを提供する。【解決手段】管状部材に消音器が配置された消音システム１０ｚであって、消音器２１は、管状部材の第一共鳴の周波数の音を消音するものであり、消音器は空洞部３０および開口部３２を有する。開口部は、管状部材１２の第一共鳴の音場空間に接続されており、空洞部内又は開口部を覆う位置に、音エネルギーを熱エネルギーに変換する変換機構が配置されており、消音器の開口部の面積をＳ1、空洞部の内壁の表面積をＳdとすると、面積Ｓdに対する面積Ｓ1の割合Ｓ1/Ｓdは、０＜Ｓ1／Ｓd＜４０％を満たし、第一共鳴の共鳴周波数における音波の波長をλとすると、消音器内の音波の進行方向における空洞部の深さＬdは、０．０１１×λ＜Ｌd＜０．２５×λを満たす。【選択図】図１
SOUND-DEADENING SYSTEM
消音システム
SUGAWARA YOSHIHIRO (author) / YAMAZOE SHOGO (author) / HAKUTA SHINYA (author) / OTSU AKIHIKO (author)
2019-04-04
Patent
Electronic Resource
Japanese
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