SE8800867L - sound reflector - Google Patents

sound reflector

Info

Publication number
SE8800867L
SE8800867L SE8800867A SE8800867A SE8800867L SE 8800867 L SE8800867 L SE 8800867L SE 8800867 A SE8800867 A SE 8800867A SE 8800867 A SE8800867 A SE 8800867A SE 8800867 L SE8800867 L SE 8800867L
Authority
SE
Sweden
Prior art keywords
cavity
low frequency
infrasound
sound
frequency sound
Prior art date
Application number
SE8800867A
Other languages
Swedish (sv)
Other versions
SE8800867D0 (en
Inventor
R Sandstroem
Original Assignee
Infrasonik Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Infrasonik Ab filed Critical Infrasonik Ab
Priority to SE8800867A priority Critical patent/SE8800867L/en
Publication of SE8800867D0 publication Critical patent/SE8800867D0/en
Priority to PCT/SE1989/000122 priority patent/WO1989008909A1/en
Priority to AU32921/89A priority patent/AU3292189A/en
Publication of SE8800867L publication Critical patent/SE8800867L/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
    • F23M20/005—Noise absorbing means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention relates to an arrangement at a boiler plant or other cavity (4), where a pure tone of low frequency sound, preferably infrasound, with high intensity is generated. In certain cases, part of the acoustic power generated by an infrasound generator can leak out from the cavity (4) through ducts (5) for the evacuation of flue gases or similar tubes or pipes. According to the invention, a sound reflector (6) is installed in connection with said duct (5), in order to reflect leaking low frequency sound, if any, back into the cavity (4).
SE8800867A 1988-03-10 1988-03-10 sound reflector SE8800867L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE8800867A SE8800867L (en) 1988-03-10 1988-03-10 sound reflector
PCT/SE1989/000122 WO1989008909A1 (en) 1988-03-10 1989-03-10 Sound reflector
AU32921/89A AU3292189A (en) 1988-03-10 1989-03-10 Sound reflector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8800867A SE8800867L (en) 1988-03-10 1988-03-10 sound reflector

Publications (2)

Publication Number Publication Date
SE8800867D0 SE8800867D0 (en) 1988-03-10
SE8800867L true SE8800867L (en) 1989-09-11

Family

ID=20371648

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8800867A SE8800867L (en) 1988-03-10 1988-03-10 sound reflector

Country Status (3)

Country Link
AU (1) AU3292189A (en)
SE (1) SE8800867L (en)
WO (1) WO1989008909A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8902831A (en) * 1989-11-16 1991-06-17 Philips Nv SPEAKER SYSTEM CONTAINING A HELMHOLTZ RESONATOR COUPLED WITH AN ACOUSTIC TUBE.
EP1213538B1 (en) * 2000-12-08 2006-09-06 Alstom Technology Ltd Exhaust gas system with Helmholtz resonator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE110315C1 (en) *
DE1147769B (en) * 1959-04-10 1963-04-25 Sulzer Ag Resonator
US3434565A (en) * 1967-12-21 1969-03-25 Walker Mfg Co Silencer with angled tuning tube leading to helmholtz resonator
US3525419A (en) * 1968-02-07 1970-08-25 Cassel Thomas Richard Exhaust system
US4281741A (en) * 1979-10-01 1981-08-04 General Motors Corporation Compact exhaust silencer for diesel locomotives
DE3517859A1 (en) * 1985-05-17 1986-11-20 Wolf Klimatechnik GmbH, 8302 Mainburg Heating boiler

Also Published As

Publication number Publication date
SE8800867D0 (en) 1988-03-10
WO1989008909A1 (en) 1989-09-21
AU3292189A (en) 1989-10-05

Similar Documents

Publication Publication Date Title
IT1287206B1 (en) COMBINED CYCLE POWER PLANT WITH USE OF WASTE HEAT FROM THE GAS TURBINE EXHAUST
GB2005384A (en) Multi-layer acoustic lining
UA27923C2 (en) Steam generator
SE7809557L (en) CO-AXIAL ROD CONNECTION
IN162296B (en)
SE9702087D0 (en) Drive system for a vehicle
SE8800867D0 (en) sound reflector
NO154064C (en) Exhaust gas boilers.
SE8306392D0 (en) EXTENDED RING CHANNEL, SPECIAL FOR HIGH POWER GAS TURBINES
FI982107A0 (en) Reactive muffler for industrial air ducts and its use
DE3865650D1 (en) GAS TURBINE SYSTEM.
SE8505903D0 (en) Catalyst
FR2510184B1 (en)
JPS5413821A (en) Exhaust pipe for two cycle engine
SU1280143A1 (en) Insert silencer
SE8901755D0 (en) PUMP HEAD FOR COMPACT LIGHT PIPES
SU1136211A1 (en) Acoustic radiator
ATE134262T1 (en) AIR INLET MEANS
DK0855005T3 (en) Waste treatment plants
CY1105534T1 (en) TURBINE ENGINE INCORPORATING A VIBRATION SUPPRESSION MECHANISM
MY132782A (en) Mounting for silencers
SE8602336D0 (en) VERMEPANNA
RU95104010A (en) Steam-gas plant
KR960008685U (en) Sound generating device of gas cock for gas stove
KR860006603A (en) Multiple power generation methods that can use multiple generators using sealed pipes