Studio Acoustic Treatment (Thesis )

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    A3%!G%H!ZA/!I5#8%!.#!J%!*)23!J%..%5!'#5!5%2#50-,&!/.)0-#L/!I)5I#/%/O!3#H%8%56!

    *#5%!*%+/)5%*%,./!*)/.!J%!.+N%,!.#!-,/)5%!.3%!+22)5+2B!#'!.3%!2+$2)$+.-#,/K!A3+.!

    ),'#5.),+.%$B!H-$$!,#.!J%!I+5.!#'!.3-/!I5#D%2.!J).!-.!-/!#'!/-&,-'-2+,.!-*I#5.+,2%!/#!/#*%#,%!

    /3#)$0!.+N%!.3-/!-,!+22#),.!-,!').)5%!H#5N/K!@#5%!A-$%/!+5%!+8+-$+J$%!#,!j"@!J)-$0-,&!.3+.!

    2+,!3%$I!'#5!')5.3%5!.5%+.*%,.!+,0!5%0)2%!+!J-.!*#5%!.3%!ZA!#'!1.)0-#!>K!!! ! !

    ! ! !

    NHS!K @#5%!+2#)/.-2+$!.-$%!/3#)$0!J%!.%/.%0!#,!.3%!5%8%5J%5+.-#,!5##*K!@#5%!.3+,!#,%!.-$%!2+,!J%!I$+2%0!-,!.3%!5##*!+,0!'-,0!.3%!+J/#5I.-#,!#'!*#5%!.3+,!#,%!.-$%K!@#5%#8%56!

    *%+/)5%*%,./!JB!N%%I-,&!0-''%5%,.!0-/.+,2%/!J%.H%%,!.3%!H+$$!+,0!.3%!.-$%!2+,!J%!

    .+N%,!H3-$%!.3%!+-5!/I+2%!23+,&%/!.3%!+J/#5I.-#,!#'!.3%!5##*K!!

    EK 9$+2%!.3%!+2#)2.-2+$!.-$%/!#,!/.)0-#!>!+,0!'-,0!.3%!,%H!5%8%5J%5+.-#,!.-*%/K!

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    EY!

    FK @#5%!%U2$)/-8%!5%/%+523!#,!5##*!5%/#,+,2%/K!"+$2)$+.%!.3%!5%8%5J%5+.-#,!.-*%!#'!%+23!*#0%K!@+N%!*#5%!I+5.-2)$+5!2#,2$)/-#,/K!

    ?K 1)&&%/.-#,/!#'!J+//!.5+I/6!+,0!.%/.!I+5.-2)$+5!*+.%5-+$!.3+.!2+,!J%!)/%0!+/!J+//!.5+I/K!!!

    RH!]$10'&(!>#.!=>/C&(!

    3&6+'.$#1!@+($)$+#(!,+'!'++4!'&(+#>#6&(!&B@&'$4)!L!

    !

    !

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

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    !

    E>!

    !

    !

    !

    =>/C&!L!

    Length 3.15 m

    Width 2.18 m

    Height 3.02 m

    Volume L*W*H = 20.73

    !

    =>/C&!A!

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    EE!

    3++4!:+.&(!6>C60C>)$+#!

    Modes

    Eigen

    frequencies

    1 0 0 54.6hz Axial

    0 0 1 56.9hz Axial

    0 1 0 78.9hz Axial

    1 0 1 78.9hz Tangential

    1 1 0 96hz Tangential

    0 1 1 97.3hz Tangential

    2 0 0 109.2hz Axial

    1 1 1 111.5hz Oblique

    0 0 2 113.9hz Axial

    2 0 1 123.1hz Tangential

    1 0 2 126.3hz Tangential

    2 1 0 134.7hz Tangential0 1 2 138.5hz Tangential

    2 1 1 146.2hz Oblique

    1 1 2 148.9hz Oblique

    0 2 0 157.8hz Axial

    2 0 2 157.8hz Tangential

    3 0 0 163.8hz Axial

    1 2 0 166.9hz Tangential

    0 2 1 167.7hz Tangential

    0 0 3 170.9hz Axial

    3 0 1 173.3hz Tangential

    1 2 1 176.2hz Oblique2 1 2 176.4hz Oblique

    1 0 3 179.3hz Tangential

    3 1 0 181.8hz Tangential

    0 1 3 188.2hz Tangential

    2 2 0 191.9hz Tangential

    0 2 2 194.6hz Tangential

    3 0 2 199.5hz Tangential

    2 2 1 200.1hz Oblique

    1 2 2 202.1hz Oblique

    2 0 3 202.7hz Tangential

    4 0 0 218.4hz Axial

    2 2 2 223.1hz Oblique4 0 1 225.7hz Tangential

    3 2 0 227.4hz Tangential

    0 0 4 227.8hz Axial

    4 1 0 232.2hz Tangential

    0 2 3 232.5hz Tangential

    0 3 0 236.6hz Axial

    !

    =>/C&!N!

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    EF!

    3++4!:+.&!5#>C*($(!

    REC4 REC5 REC6 REC7 REC8 REC9 Sp_FrRes

    53hz 62.5 60 60 51 60 55 52

    54hz 61 60 60 51 61 55 52

    55hz 62 61 61 53 62 56 52.5

    56hz 65 61 63 53 64 57 52

    57hz 65 65 65 54 65 60 53

    76hz 50 50 51 55 55 62 55

    77hz 50 50 53 56 57 65 55

    78hz 48 49 60 60 57 67 55.5

    79hz 48 50 61 61.5 59.5 67.5 55.5

    80hz 48 50 65 64 60 70 56

    94hz 50 53 63 52 44 57 57.5

    95hz 52 50 63 51 44 57 57.5

    96hz 51 47 65 53 45 58 57.5

    97hz 53 45 66 53 45 57.5 58

    98hz 52 46 65 54 46 58 58

    108hz 65 69 53 63 59 65 59

    109hz 69 69 60 65 60 68 59

    110hz 69 68 62 66 62 66 59

    111hz 64 63 65 62 62 65 59112hz 65 62 64 59 63 64 59.5

    113hz 67 66 68 65 65 66 59.5

    114hz 70 69 68 69 68 68 59.5

    115hz 69 68 64 68 65 64 59.5

    145hz 57 48 65 58 54.5 50 60

    146hz 56 46 67 57.5 54 50 60

    147hz 56 45 68 59 54 51 60

    148hz 57 45 70 58 54 53 60.5

    149hz 59 46 73 56 57 53 61

    156hz 71 62 54 72.5 64 67 60157hz 72 66 64 72 65 72 60.5

    158hz 71 64 65 71 64 72 60.5

    159hz 70 60 62 66.5 60 68 61

    175hz 58 53 65 64 60 74 60

    176hz 56 56 64 63 58 74 60

    177hz 55 58 60 59.5 55 74 60

    178hz 58 58 57 58 52 73 60

    !

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    E?!

    =>/C&!R!

    ?#,C0&!+,!,'&F0*!'&(@+#(&!+#!3++4!:+.&(!

    Rec4 Rec5 Rec6 Rec7 Rec8 Rec9

    53hz 10.5dB 8dB 8dB -1dB 8dB 3dB

    54hz 9dB 8dB 8dB -1dB 9dB 3dB

    55hz 9.5dB 8.5dB 8.5dB 0.5dB 9.5dB 3.5dB

    56hz 13dB 9dB 11dB 1dB 12dB 5dB

    57hz 12dB 12dB 12dB 1dB 12dB 7dB

    76hz -5dB -5dB -4dB 0dB 0dB 7dB

    77hz -5dB -5dB -2dB 1dB 2dB 10dB

    78hz - 7.5dB -6.5dB 4.5dB 4.5dB 2.5dB 11.5dB

    79hz -7.5dB -5.5dB 5.5dB 6dB 4dB 12dB80hz -8dB -6dB 9dB 8dB 4dB 14dB

    94hz -7.5dB -4.5dB 5.5dB -5.5dB -13.5dB -0.5dB

    95hz -5.5dB -7.5dB 5.5dB -6.5dB -13.5dB -0.5dB

    96hz -6.5dB

    -

    10.5dB 7.5dB -4.5dB -12.5dB 0.5dB

    97hz -5dB -13dB 8dB -5dB -13dB -0.5dB

    98hz -6dB -12dB 7dB -4dB -12dB 0dB

    108hz 6dB 10dB -6dB 4dB 0dB 6dB

    109hz 10dB 10dB 1dB 6dB 1dB 9dB

    110hz 10dB 9dB 3dB 7dB 3dB 7dB

    111hz 5dB 4dB 6dB 3dB 3dB 6dB

    112hz 5.5dB 2.5dB 4.5dB -0.5dB 3.5dB 4.5dB

    113hz 7.5dB 6.5dB 8.5dB 5.5dB 5.5dB 6.5dB

    114hz 9.5dB 8.5dB 8.5dB 9.5dB 8.5dB 8.5dB

    115hz 8.5dB 7.5dB 5.5dB 8.5dB 5.5dB 4.5dB

    145hz -3dB -12dB 5dB -2dB -5.5dB -10dB

    146hz -4dB -14dB 7dB -2.5dB -6dB -10dB

    147hz -4dB -15dB 8dB -1dB -6dB -9dB

    148hz -3.5dB

    -

    15.5dB 9.5dB -2.5dB -6.5dB -7.5dB149hz -2dB -15dB 12dB -5dB -4dB -8dB

    156hz 11dB 2dB -6dB 12.5dB 4dB 7db

    157hz 11.5dB 5.5dB 3.5dB 11.5dB 4.5dB 11.5dB

    158hz 10.5dB 3.5dB 4.5dB 10.5dB 3.5dB 11.5dB

    159hz 9dB -1dB 1dB 6.5dB -1dB 7dB

    175hz -2dB -7dB 5dB 4dB 0dB 14dB

    176hz -4dB -4dB 4dB 3dB -2dB 14dB

    177hz -5dB -2dB 0dB -0.5dB -5dB 14dB

    178hz -2dB -2dB -3dB -2dB -8dB 13dB

    !

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    E

    =>/C&!S!

    3++4!:+.&!>#>C*($(!7!3&6+'.$#1(!0($#1!!>!.$'&6)$+#>C!4$6'+@2+#&!

    Rec4 Rec9 Boost Rec4 Boost Rec9

    53hz 54dB 46.5dB 2dB - 5.5dB

    54hz 55dB 48dB 3dB - 4dB

    55hz 56dB 48.5dB 3.5dB - 4dB

    56hz 58dB 50dB 6dB - 2dB

    57hz 60dB 49.5dB 7dB - 3.5dB

    76hz 54dB 58dB - 1dB 3dB

    77hz 53.5dB 60dB - 1.5dB 5dB

    78hz 53dB 60.5dB - 2.5dB 5dB

    79hz 55dB 64dB - 0.5dB 8.5dB80hz 54.5dB 65dB - 1.5dB 9dB

    94hz 50dB 55.5dB - 7.5dB - 2dB

    95hz 50dB 57.5dB - 7.5dB 0dB

    96hz 51.5dB 56dB - 6dB - 1.5dB

    97hz 53.5dB 56dB - 4.5dB - 2dB

    98hz 53.5dB 57.5dB - 4.5dB - 0.5dB

    108hz 64dB 65.5dB 5dB 6.5dB

    109hz 66.5dB 68dB 7.5dB 9dB

    110hz 68.5dB 70dB 9.5dB 11dB111hz 66.5dB 67dB 7.5dB 8dB

    112hz 65dB 65.5dB 5.5dB 6dB

    113hz 67.5dB 66.5dB 8dB 7dB

    114hz 69dB 67.5dB 9.5dB 8dB

    115hz 68dB 64dB 9.5dB 4.5dB

    145hz 60dB 55dB 0dB - 5dB

    146hz 60dB 56.5dB 0dB - 3.5dB

    147hz 60.5dB 57.5dB 0.5dB - 2.5dB

    148hz 62dB 57dB 1.5dB - 3.5dB

    149hz 63dB 57.5dB 2dB - 3.5dB

    156hz 75dB 73dB 15dB 13dB

    157hz 77dB 75dB 16.5dB 14.5dB

    158hz 76.5dB 76dB 16dB 15.5dB

    159hz 73dB 74dB 12dB 13dB

    175hz 61dB 81dB 1dB 21dB

    176hz 61.5dB 81dB 1.5dB 21dB

    177hz 64dB 80dB 4dB 20dB

    178hz 68dB 80dB 8dB 20dB

    !

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    E=!

    =>/C&!M!

    3++4!:+.&!5#>C*($(!7!m'+0@!5#>C*($(!:&)2+.U$#>660'>)&!'&(0C)(W!

    REC4 REC5 REC6 REC7 REC8 REC9

    53hz 50 46 46 41 52 48 DB

    54hz 57 52 52 48 59 52 DB

    55hz 62 58 58 54 64 58 DB

    56hz 69 63 63 58 69 62 DB

    57hz 71 68 68 58 70 66 DB

    76hz 55 55 56 58 60 67 DB

    77hz 52 55 60 57 58 65 DB

    78hz 53 56 61 58 56 66 DB79hz 46 55 66 56 53 63 DB

    80hz 35 54 69 50 46 56 DB

    94hz 35 51 65 35 29 42 DB

    95hz 41 50 63 42 35 50 DB

    96hz 49 43 61 50 41 54 DB

    97hz 52 38 56 53 46 59 DB

    98hz 55 30 50 58 49 60 DB

    108hz 70 50 40 69 62 70 DB

    109hz 73 62 51 71 67 72 DB110hz 73 70 61 70 68 71 DB

    111hz 69 69 66 65 66 68 DB

    112hz 65 67 69 61 63 63 DB

    113hz 65 69 71 61 62 62 DB

    114hz 61 66 71 60 59 59 DB

    115hz 52 54 69 54 50 50 DB

    145hz 40 32 69 44 39 35 DB

    146hz 48 38 68 50 44 41 DB

    147hz 52 41 65 55 50 48 DB

    148hz 58 44 62 58 56 52 DB

    149hz 61 49 58 60 60 58 DB

    156hz 75 68 40 78 69 73 DB

    157hz 78 71 61 78 71 78 DB

    158hz 77 68 68 77 69 78 DB

    159hz 72 62 68 72 64 75 DB

    175hz 60 58 70 69 62 80 DB

    176hz 56 58 68 62 58 77 DB

    177hz 51 55 60 53 50 72 DB

    178hz 47 50 49 44 40 66 DB

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    Ea!

    !

    =>/C&!Y!

    3++4!:+.&!>#>C*($(!U&B6$)$#1!>CC!'++4!4+.&(W!

    Roomresonsnces(dB)

    Speaker's Frequencyresponse(dB) Boost(dB)

    49hz 58 50.5 7.5dB

    50hz 60 50.5 9.5dB

    51hz 61.5 51 10.5dB

    52hz 63 52 11dB

    53hz 60 52 8dB

    54hz 60 52 8dB

    55hz 61 52.5 8.5dB56hz 63 52 11dB

    57hz 65 53 12dB

    58hz 65 53 12dB

    59hz 64 53 11dB

    60hz 62.5 53 9.5dB

    61hz 61.5 53.5 9dB

    62hz 60 53.5 6.5dB

    63hz 58 53.5 4.5dB

    64hz 57.5 53.5 4dB

    65hz 56.5 53.5 3dB

    66hz 56 54 2dB67hz 55 54 1dB

    68hz 55 54 1dB

    69hz 54 54 0dB

    70hz 52.5 54 - 1.5dB

    71hz 52.5 54.5 - 2dB

    72hz 52 54.5 - 2.5dB

    73hz 50 54.5 - 5dB

    74hz 50 54.5 - 4.5dB

    75hz 50 55 - 5dB

    76hz 51 55 - 4dB

    77hz 53 55 - 2dB

    78hz 60 55.5 4.5dB79hz 61 55.5 5.5dB

    80hz 65 56 9dB

    81hz 62 56 6dB

    82hz 60 56.5 3.5dB

    83hz 58 56.5 1.5dB

    84hz 57 56.5 0.5dB

    85hz 58 56.5 1.5dB

    86hz 57 57 0dB

    87hz 58 57 1dB

    88hz 58 57 1dB

    89hz 57 57 0dB

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    E;!

    90hz 60 57 3dB

    91hz 60 57 3dB

    92hz 61 57.5 3.5dB

    93hz 62.5 57.5 5dB

    94hz 63 57.5 5.5dB

    95hz 63 57.5 5.5dB96hz 65 57.5 7.5dB

    97hz 66 58 8dB

    98hz 65 58 7dB

    99hz 67 58 9dB

    100hz 66 58 8dB

    101hz 65 58 7dB

    102hz 64 58 6dB

    103hz 62 58 4dB

    104hz 59 58 1dB

    105hz 57 58.5 - 1.5dB

    106hz 56 58.5 - 2.5dB

    107hz 55 58.5 - 3.5dB

    108hz 53.5 59 - 5.5dB

    109hz 60 59 1dB

    110hz 62 59 3dB

    111hz 65 59 6dB

    112hz 64 59.5 4.5dB

    113hz 68 59.5 8.5dB

    114hz 68 59.5 8.5dB

    115hz 64 59.5 4.5dB

    116hz 63 59.5 3.5dB

    117hz 60 59.5 0.5dB

    118hz 58 59.5 - 1.5dB119hz 57.5 59.5 - 2dB

    120hz 57.5 59.5 - 2dB

    121hz 57 59.5 - 2.5dB

    122hz 57 59.5 - 2.5dB

    123hz 57 59.5 - 2.5dB

    124hz 63.5 59.5 4dB

    125hz 66 59.5 6.5dB

    126hz 71 59.5 11.5dB

    127hz 70.5 60 10.5dB

    128hz 68 60 8dB

    129hz 66 60 6dB

    130hz 65 60 5dB

    131hz 64 60 4dB

    132hz 62.5 60 2.5dB

    133hz 63.5 60 3.5dB

    134hz 63 60 3dB

    135hz 60 60 0dB

    136hz 59.5 60 - 0.5dB

    137hz 60.5 60 0.5dB

    138hz 66 60 6dB

    139hz 65.5 60 5.5dB

    140hz 65 60 5dB

    141hz 64 60 4dB

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    !

    42#)/.-2/!+,0!@)/-2!A%23,#$#&B!

    C-,+$!95#D%2.!

    !

    F:!

    142hz 63 60 3dB

    143hz 64 60 4dB

    144hz 64 60.5 3.5dB

    145hz 65 60.5 4.5dB

    146hz 67 60.5 6.5dB

    147hz 68 60 8dB148hz 70 60.5 9.5dB

    149hz 73 61 12dB

    150hz 69 61 8dB

    151hz 66 61 5dB

    152hz 62.5 60.5 2dB

    153hz 60 60.5 - 0.5dB

    154hz 55 60.5 - 5.5dB

    155hz 52 60 - 8dB

    156hz 54 60 - 6dB

    157hz 64 60.5 3.5dB

    158hz 65 60.5 4.5dB

    159hz 62 61 1dB

    160hz 57 61 - 4dB

    161hz 56.5 61 -4.5dB

    162hz 56 61.5 - 5.5dB

    163hz 56 60.5 -4.5dB

    164hz 54 60.5 - 6.5dB

    165hz 54.5 60.5 - 6dB

    166hz 55.5 60.5 - 5dB

    167hz 56 60 - 4dB

    168hz 56 60 - 4dB

    169hz 57.5 60 - 2.5dB

    170hz 58 60 - 2dB171hz 59.5 60 - 0.5dB

    172hz 60 60 0dB

    173hz 62.5 60 2.5dB

    174hz 63 60 3dB

    175hz 65 60 5dB

    176hz 64 60 4dB

    177hz 62 60 2dB

    178hz 65 60 5dB

    179hz 66 60 6dB

    180hz 65.5 60 5.5dB

    !

    3&%&'/&'>)$+#!=$4&!

    =>/C&!P!

    REVERBERATION TIME

    Studio 1

    Pink Noise(rec5) Pink Noise(rec6) Pink Noise(rec7)

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    !

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    !

    FY!

    RT60 RT60 RT60

    63 Hz 1.62 1.55 1.58

    125Hz 1.45 1.58 1.48

    250Hz 1.68 1.6 1.55

    500Hz 1.51 1.41 1.55

    1Khz 1.54 1.55 1.622Khz 1.58 1.5 1.61

    4Khz 1.29 1.4 1.34

    8Khz 1.46 1.45 1.5

    White Noise(rec5)

    White

    Noise(rec6)

    White

    Noise(rec7)

    RT60 RT60 RT60

    63 Hz 1.66 1.6 1.55

    125Hz 1.48 1.45 1.52

    250Hz 1.33 1.42 1.45500Hz 1.22 1.3 1.45

    1Khz 1.33 1.44 1.48

    2Khz 1.23 1.43 1.39

    4Khz 1.3 1.4 1.4

    8Khz 1.29 1.32 1.4

    !

    =>/C&!Z!

    Studio 2

    Pink Noise(rec5) Pink Noise(rec6) Pink Noise(rec7)

    RT60 RT60 RT60

    63 Hz 1.1 1.02 0.99

    125Hz 1.04 0.9 0.75

    250Hz 1.09 1.1 0.88

    500Hz 1.12 1.02 0.98

    1Khz 0.9 0.83 0.84

    2Khz 0.82 0.9 1.08

    4Khz 0.69 0.79 0.84

    8Khz 0.73 0.76 0.88

    White Noise(rec5)

    WhiteNoise(rec6)

    WhiteNoise(rec7)

    RT60 RT60 RT60

    63 Hz 0.88 1.01 0.92

    125Hz 0.6 0.64 0.77

    250Hz 0.93 0.88 0.93

    500Hz 0.86 1 0.88

    1Khz 0.9 0.91 0.8

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    !

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    !

    F>!

    2Khz 0.84 0.9 0.89

    4Khz 0.82 0.88 1

    8Khz 0.9 0.91 0.79

    !

    !

    =>/C&!LT!

    3=MT!5%&'>1&!

    RT60 & Abs.CoefStudio 1(RT) Studio 2(RT) Studio 1(a) Studio 2(a)

    63 Hz 1.59 0.98 0.046 0.075125Hz 1.49 0.78 0.049 0.094

    250Hz 1.5 0.96 0.049 0.076

    500Hz 1.4 0.97 0.052 0.075

    1Khz 1.49 0.86 0.049 0.085

    2Khz 1.45 0.9 0.05 0.081

    4Khz 1.35 0.82 0.054 0.089

    8Khz 1.4 0.82 0.052 0.089

    Average= 1.45

    Average =

    0.88

    Average=

    0.05

    Average=

    0.083

    !

    =>/C&!LL!

    ]'&F0$&(!+,!:0($6>C!#+)&(!UMTW!

    F#1 46.25hz

    G1 49hz

    G#1 51.91hz

    A1 55hzA#1 58.27hz

    B1 61.74hz

    C2 65.41hz

    C#2 69.30hz

    D2 73.42hz

    D#2 77.78hz

    E2 82.41hz

    F2 87.31hz

    F#2 92.50hz

    G2 98hz

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    G#2 103.83hz

    A2 110hz

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    Empty Room1stRec 2ndRec 3rdRec 4thRec Average

    RT60 RT60 RT60 RT60

    63hz 10.56s 10.48s 10.90s 9.90s 10.46s

    125hz 10.4s 10.4s 9s 11.2s 10.25s

    250hz 8.85s 8.45s 9.1s 8.7s 8.77s

    500hz 6.66s 7.11s 4.6s 5.61s 6.04s

    1khz 5.16s 4.92s 5.73s 6.3s 5.52s

    2khz 4.23s 4.08s 4.44s 4.98s 4.43s

    4khz 3.31s 3.27s 3.65s 3.80s 3.51s

    8khz 2.21s 2.18s 2.4s 2.52s 2.32s

    6.41s

    Room with material1stRec 2ndRec 3rdRec 4thRec Average

    RT60 RT60 RT60 RT60

    63hz 4.6s 5.00s 5.02s 4.32s 4.73s

    125hz 4s 4.6s 4.95s 5.2s 4.68s

    250hz 4.11s 4.53s 4.68s 5.1s 4.60s

    500hz 3.51s 3.27s 4.37s 3.51s 3.66s

    1khz 3.12s 2.92s 3.15s 3.00s 3.04s

    2khz 2.52s 2.41s 2.69s 2.94s 2.64s

    4khz 2.1s 2.15s 2.33s 2.40s 2.24s

    8khz 1.68s 1.6s 1.72s 1.78s 1.69s

    3.41s

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    Wall2 3.15m 3.02m 9.513

    Wall1' 2.18m 3.02m 6.583

    Wall2' 3.15m 3.02m 9.513

    Ceiling 3.15m 2.18m 6.867

    Floor 3.15m 2.18m 6.867

    Total Area45.926

    Window 1.14m 1.14m 1.299

    Door 2.17m 1.10m 2.387

    Vent 0.41m 0.48m 0.168

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    125h

    z

    250h

    z

    500h

    z

    1kh

    z

    2kh

    z

    4kh

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    Floor Materials

    carpet 0.01 0.02 0.06 0.15 0.25 0.45

    Concrete(unpainted) 0.01 0.02 0.04 0.06 0.08 0.1

    Concrete(painted) 0.01 0.01 0.02 0.02 0.02 0.02

    Marble or glazed tile 0.01 0.01 0.01 0.01 0.02 0.02

    Vinyl tile 0.02 0.03 0.03 0.03 0.03 0.02

    Wood Parquet on concrete 0.04 0.04 0.07 0.06 0.06 0.07

    Wood flooring on Joists 0.15 0.11 0.1 0.07 0.06 0.07

    Wall materials

    Brick (Natural) 0.03 0.03 0.03 0.04 0.05 0.07

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    Brick(painted) 0.01 0.01 0.02 0.02 0.02 0.03

    Concrete Block(coarse) 0.36 0.44 0.31 0.29 0.39 0.25

    Concrete Block(Painted) 0.1 0.05 0.06 0.07 0.09 0.08

    Doors(Solid wood panels) 0.1 0.07 0.05 0.04 0.04 0.04

    Glass(1/4" plate, large pane) 0.18 0.06 0.04 0.03 0.02 0.02

    Glass(small pane) 0.04 0.04 0.03 0.03 0.02 0.02Plasterboard(12mm(1/2")paneling on studs) 0.29 0.1 0.06 0.05 0.04 0.04

    Plaster(gypsum or lime,on masonry) 0.01 0.02 0.02 0.03 0.04 0.05

    Plaster(gypsum or lime,on wood lath) 0.14 0.1 0.06 0.05 0.04 0.04Plywood(3mm(1/8")pan.over31.7mm(1-1/4")airspace 0.15 0.25 0.12 0.08 0.08 0.08Plywood(3mm(1/8")pan.over57.1mm(2-1/4")airspace 0.28 0.2 0.1 0.1 0.08 0.08Plywood(3mm(3/16")pan.over50mm(2")airspace 0.38 0.24 0.17 0.1 0.08 0.05

    Drapery(10oz/yd2,340gr/m2,flat against wall) 0.04 0.05 0.11 0.18 0.3 0.35

    Drapery(14oz/yd2,476gr/m2,flat against wall) 0.05 0.07 0.13 0.22 0.32 0.35

    Fiberglass board(25mm(1")thick) 0.06 0.2 0.65 0.9 0.95 0.98

    Fiberglass board(50mm(1")thick) 0.18 0.79 0.99 0.99 0.99 0.99

    Fiberglass board(75mm(1")thick) 0.53 0.99 0.99 0.99 0.99 0.99Performatedmetal(13%open,over50mm(2")fiberglas) 0.25 0.64 0.99 0.97 0.88 0.92

    Ceiling materialsPlasterboard(12mm(1/2")in suspended ceiling

    grid 0.15 0.11 0.04 0.04 0.07 0.08Underlay in perforated metal panels

    25mm(1")batts) 0.51 0.78 0.57 0.77 0.9 0.79Metal deck(perforated channels

    25mm(1")batts) 0.19 0.69 0.99 0.88 0.52 0.27Metal deck(perforated channels75mm(3")batts) 0.73 0.99 0.99 0.89 0.52 0.31

    People(adults)(per 1/10 person) 0.25 0.35 0.42 0.46 0.5 0.5

    !

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    Down Length 1 5.74mDown Length 2 6.11m

    Up Length 1 5.80m

    Up Length 2 6.30m

    Down Width 1 1.77m

    Down Width 2 2.78m

    Up Width 1 1.82m

    Up Width 2 2.84m

    Height 1 2.44m

    Height 2 2.92m

    !

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    63hz 0.679 0.949 0.46

    125hz 0.681 0.953 0.46

    250hz 0.606 0.848 0.41

    500hz 0.635 0.888 0.43

    1khz 0.868 1.214 0.59

    2khz 0.902 1.262 0.61

    4khz 0.948 1.325 0.64

    8khz 0.943 1.319 0.64!

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    RT

    63hz 0.44s

    125hz 0.36s

    250hz 0.44s

    500hz 0.44s

    1khz 0.38s

    2khz 0.40s

    4khz 0.37s

    8khz 0.37s

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    RT(sec)

    Recording

    Studio 0.2 - 0.6

    Classroom 0.6 - 1.0

    ConferenceRoom 0.6 - 1.0

    Cinemas 0.8 - 1.2

    Small Theatres 1.0 - 1.4

    Auditoriums 1.4 - 2.0

    Churches 1.4 - 2.0

    Rock Bands 1.0 - 1.4Classical Music 1.2 - 1.6

    Chamber Music 1.4 - 1.8

    Opera 1.4 - 1.8

    Secular Choir 1.6 - 2.0

    Symphonic 1.6 - 2.2

    Orchestra 1.8 - 2.6

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