Wall Comparison

Notes: Red - is fiction. I just made data in that region up;     Yellow - is either Predictive Software (Insul), or is out of the labs certified measurement zone
Dollar Costs are incomplete estimates, and always use Roxul Safe n Sound.
Vertical Axis = sound pressure level in db;     Horizontal Axis = frequency in hz

This table is to be used if you are concerned about noise you create affecting sleeping babies upstairs.
Description Picture Sound Transmission Loss 85db - TL
unweighted measured in the next room		 85db - TL - dB(A)
Official Annoyance (measured)		 85db - TL - FletchMunsonRobinsonDadson
i.e. heard in the next room
Not accepted by any standards		 Cost
8'x8' wall		 Source
G13_WS90(406)_CFL90_G13

single layer of 13 mm (1/2") type X gypsum board
90 mm wood studs (2x4) at 406 mm (16") on centre
90 mm of blown cellulose fibre insulation in cavity
single layer of 13 mm type X gypsum board		 $125 IRC761 pg19
2G13_WS90(406)_CFL90_2G13

single layer of 13 mm (1/2") type X gypsum board
single layer of 13 mm type X gypsum board
90 mm wood studs (2x4) at 406 mm (16") on centre
90 mm of blown cellulose fibre insulation in cavity
single layer of 13 mm type X gypsum board
single layer of 13 mm type X gypsum board		 $147 IRC761 pg26
2G16_SWS140(406)_GFB90_2G16

single layer of 16 mm (5/8") type X gypsum board
single layer of 16 mm type X gypsum board
90 mm wood studs (2x4) at 406 mm (16")on centre
90 mm of glass fibre insulation in cavity
single layer of 16 mm type X gypsum board
single layer of 16 mm type X gypsum board		 $165 IRC761 pg296
110mm Boral Masonry Quickbrick AG: Ex Vic., Cored Block. Finished wall nominal 185kg/m2 laid. 220mm between partitians. ? Page 7, ADM16* 220
RSIC-1 on 2x4 Timber Framing 16 Inches On Center with Double Layer 5/8 inch Gypsum Board on RSIC clips and Triple Layer 5/8 Inch Gypsum Board on Direct $227 PAC-INTL RAL_TL01-212
3G16_WS90_GFB_AIR25_WS90_GFB_2G16 $214 Insul 3G16
4"(90mm) concrete block [30lb/ft^2 (147kg/m2)], 2.4" (60mm) air, 2.5"(65mm) rigid fiberglass panels, 4"(90mm) concrete block [30lb/ft^2(147kg/m^2)], 5/8" (16mm) gypsum board ? "Noise Control In Buildings"
NRCC
by Cyril M. Harris
ISBN 0962297317 / 0070288878
Chapter Five, page 5.56
8" solid concrete block, 1.5" air, 2x4 wood studs, fiberglass insulation, triple layers of 5/8" (16mm) gypsum ? Insul Concrete 8




Any wall on this page will pretty much stop the above graph (fan only mode).
So, boosting that up a bit from 50db to 75db peak, gives me the following bell curve for furnace:
frequency in hertz 20 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300
noise in db 15 18 21 24 25.5 27 30 45 52.5 60 63 66 69 72 75 67.5 60 52.5 45 37.5 30 25.5 22.5 15 15


This table is to be used if you are concerned only about noise from external sources affecting your noise floor in the room, and there are no sleeping babies upstairs..
Description Picture Sound Transmission Loss Furance db - TL
unweighted measured in the next room		 Furnace db - TL - dB(A)
Official Annoyance (measured)		 Furnace db - TL - FletchMunsonRobinsonDadson
i.e. heard in the next room
Not accepted by any standards		 Cost
8'x8' wall		 Source
G13_WS90(406)_CFL90_G13

single layer of 13 mm (1/2") type X gypsum board
90 mm wood studs (2x4) at 406 mm (16") on centre
90 mm of blown cellulose fibre insulation in cavity
single layer of 13 mm type X gypsum board		 $125 IRC761 pg19
2G13_WS90(406)_CFL90_2G13

single layer of 13 mm (1/2") type X gypsum board
single layer of 13 mm type X gypsum board
90 mm wood studs (2x4) at 406 mm (16") on centre
90 mm of blown cellulose fibre insulation in cavity
single layer of 13 mm type X gypsum board
single layer of 13 mm type X gypsum board		 $147 IRC761 pg26
2G16_SWS140(406)_GFB90_2G16

single layer of 16 mm (5/8") type X gypsum board
single layer of 16 mm type X gypsum board
90 mm wood studs (2x4) at 406 mm (16")on centre
90 mm of glass fibre insulation in cavity
single layer of 16 mm type X gypsum board
single layer of 16 mm type X gypsum board		 $165 IRC761 pg296
110mm Boral Masonry Quickbrick AG: Ex Vic., Cored Block. Finished wall nominal 185kg/m2 laid. 220mm between partitians. ? Page 7, ADM16* 220
RSIC-1 on 2x4 Timber Framing 16 Inches On Center with Double Layer 5/8 inch Gypsum Board on RSIC clips and Triple Layer 5/8 Inch Gypsum Board on Direct $227 PAC-INTL RAL_TL01-212
3G16_WS90_GFB_AIR25_WS90_GFB_2G16 $214 Insul 3G16
4"(90mm) concrete block [30lb/ft^2 (147kg/m2)], 2.4" (60mm) air, 2.5"(65mm) rigid fiberglass panels, 4"(90mm) concrete block [30lb/ft^2(147kg/m^2)], 5/8" (16mm) gypsum board ? "Noise Control In Buildings"
NRCC
by Cyril M. Harris
ISBN 0962297317 / 0070288878
Chapter Five, page 5.56
8" solid concrete block, 1.5" air, 2x4 wood studs, fiberglass insulation, triple layers of 5/8" (16mm) gypsum ? Insul Concrete 8


Excel spreadsheet with the data and graphs

Excel spreadsheet with the furnace data and graphs

Item Cost 8'x8'
Gypsum Sheet - 1/2" 4x8 $11.27 $22.54
Gypsum Sheet - 1/2" 4x12 $16.87 N/A
Roxul Safe n Sound 3" x 15.5 (59.7 ft^2) $59.70 $59.70
Tape 50' $5.97 $0.95
Mud 20kg (note 67kg / 100m^2) $13.77 $1.00
2x4 by 8' $3.00 $18.00
RSIC clips $5.00 $80.00