Member
Post by ren1316 on Jul 14, 2017 13:35:23 GMT 12
Hello everyone,
Just found this place. Someone from geekzone pointed me this way.
I live in Wellington. Feel free to hit me up if anyone want to meet/discuss/talk/listen 2 channel stereo. Can talk other stuff as well.
I have mainly a digital setup although I have a Rega gathering dust. Quite a lot of LPs in boxes.
I put together ASR amp/FOCAL speaker/Aurender player/PS Audio DAC/ and various other bits and pieces.
Room not big but double layer sound zip boards, sound batt, triple layer sound glass.
Happy with the current music/sound that was produced.
John
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Post by michaelw on Jul 14, 2017 13:47:22 GMT 12
welcome john ! feel free to post threads, pictures, questions 
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Post by Owen Y on Jul 14, 2017 19:38:28 GMT 12
Welcome ren1316 - tell us about the interesting ASR amp!
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Post by colinf on Jul 14, 2017 19:59:59 GMT 12
Welcome, John. Which Focals? Why is the Rega gathering dust?
AMR-iFi R&D
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Member
Post by ren1316 on Jul 17, 2017 11:39:14 GMT 12
michaelw, Thanks for welcome. I shall. colinf, I've Focal Grande Utopia. Rega tt not used/connected cos I cannot stand the clicks n Pops. Also too much effort to keep changing sides/lps. Plus atm the digital setup sounded way better. @owen Y, ASR Emitter II with the battery option. 4 chassis all together. I love it. It is very quiet as in no buzz/hum. Sounds effortless and matches the speakers well. My fav all time amp (had Krell, Classe' etc.)
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Post by deano1974 on Jul 19, 2017 20:58:15 GMT 12
Welcome aboard
Manager & Product specialist at Rapallo AV & HI-FI
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Member
Post by ren1316 on Jul 20, 2017 8:43:53 GMT 12
deano1974 Thanks. Glad to be here. Anyone else from wellington? Would be good to meet up, hit play, have a coffee or something.
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Post by guitardude on Jul 20, 2017 9:15:36 GMT 12
Hi Ren,
welcome along. Was in welly at the weekend catching up with my 2 sons that live there and record shopping. If you are ever over this side of the water please drop us a line. I'm mainly a vinyl and CD guy though. A good mate of mine is moving up your way to Ekatahuna.
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Member
Post by ren1316 on Jul 20, 2017 10:00:32 GMT 12
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Post by guitardude on Jul 20, 2017 10:10:42 GMT 12
Hi Ren,
I'm in Nelson, Johnny Heathen is in Blenheim.
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Member
Post by ren1316 on Jul 20, 2017 10:27:26 GMT 12
Great, PM your contact number and I shall be in touch next time I am that way. John.
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Pundit
Post by SL1210 on Aug 9, 2017 12:08:32 GMT 12
Hello everyone, Just found this place. Someone from geekzone pointed me this way. I live in Wellington. Feel free to hit me up if anyone want to meet/discuss/talk/listen 2 channel stereo. Can talk other stuff as well. I have mainly a digital setup although I have a Rega gathering dust. Quite a lot of LPs in boxes. I put together ASR amp/FOCAL speaker/Aurender player/PS Audio DAC/ and various other bits and pieces. Room not big but double layer sound zip boards, sound batt, triple layer sound glass. Happy with the current music/sound that was produced. John Greets from Hawkes Bay. (Born in Wellington public hospital). I am interested in your room treatments - pics if you can :-> What are the zip boards? and triple layer glass - to keep sound out or to keep sound in? Andrei
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Member
Post by ren1316 on Aug 11, 2017 14:53:26 GMT 12
Hi Andrei, Double level sound zip(green colour) and sound batt in the interior,
Glass: 2 x 5mm glued back to back separated by LowE then 6mm (all sound control glass)
11.4.5 MEASUREMENT INDICES
Sound Transmission Loss (STL) Sound Transmission Loss
The average sound transmission loss (STL) is useful for determining the effectiveness of glazed panels to isolate exterior noise (such as traffic) from a building. It is derived from the average of the measured transmission loss at eighteen 1/3 octave frequency bands between 100Hz and 5000Hz. The average STL is measured in decibels, the higher the average STL dB figure, the more effective the glazing will be in reducing sound transmission.
Sound Transmission Class (STC)Sound Transmission Class
The sound transmission class (STC) is useful for determining the noise reduction offered by internal building elements such as partitions and walls. It is a measure that relates the sound reduction performance against sounds which normally occur inside a building (such as voices, telephones, music) The STC is a numerical class rating and can not be compared with the STL. The STC is derived from a best fit curve comparison of a reference STC curve to the insulation curve. The higher the STC the higher the overall sound reduction.
Mean Sound Reduction Index (Rm)
The mean sound reduction index has traditionally been considered one of the more complete methods of comparing insulation performance of glass. Mean reduction establishes a level of performance over a wide range of frequencies. This average of insulation values, measured in dB, is a simple indicator of a products sound insulation performance.
Weighted Sound Reduction Index (RW)Weighted Sound Reduction Index
The weighted sound reduction index is now the most common index used internationally since its adoption in the BS and ISO standards. This index has largely replaced the Rm and STC index because the weighted reduction incorporates frequency modified correction for the human ears response. The RW is reported in dB and is a composite rating of sound reduction at frequencies from 100 - 5000Hz. Numerically, it is comparable to the STC values but the numbers are in dB.
Traffic Noise Sound Reduction (Rtr)
The traffic noise reduction index is distinct from the other indices because of its dependence on a specific offending noise type. The reduction is calculated based upon the offending sound source being a typical sound spectrum of road and traffic sound and intensities. Traffic noise reduction is measured in dBA.
11.4.6 AIRBORNE SOUND INSULATION
Airborne Sound Insulation expresses the degree to which sound travelling through the air is reduced when transmitted through the building fabric or component. The ISO Standard procedures for airborne sound insulation rate the actual spaces that people occupy rather than insulation of a building element. Furthermore these new measures give specific consideration to low frequency sound. These procedures introduce new rating methods and indices known as spectrum adaptation terms.
R = Sound reduction index.
RW = Weighted sound reduction index.
C = A-weighted pink noise (speech and music).
Ctr = A-weighted urban traffic noise.
The acoustic performance of glass is stated with disclosure of the spectrum adaptation terms in brackets after the
RW index as follows: RW (C; Ctr)
Example for 12mm float glass taken from an ISO
performance table is as follows: 34 (0;-2)
Glass performance data may be either in terms of the
RW index alone or the sum of the RW and the relevant spectrum adaptation terms. For example for traffic noise: Rtr = RW + Ctr
Example for 12mm float glass taken from an ISO
performance table is as follows: 34 + (-2) = 32 dB
Note: Refer AS/NZS 1276.1:1999 (ISO 717-1:1996)
Refer ISO 140 series standards.
11.4.7 PERCEIVED SOUND REDUCTION Perceived Sound Reduction
The Perceived Sound Reduction (PSR) table quantifies the perceived reduction in sound as a percentage. The RW index sound reduction values are used to calculate the perceived sound reduction. The perceived sound reduction is a ratio relative to the RW for 3mm float glass.
eg: RW for 3mm float glass is 26dB.
RW for 7mm Soundstop is 36dB.
Reduction in sound pressure level is 10dB.
From the chart a 10dB reduction equates to a 50%
perceived reduction from the original noise.
Note: For Sound Reduction Data refer Section 12.5
Typical Performance Data
R = Sound reduction index.
RW = Weighted sound reduction index.
C = A-weighted pink noise (speech and music).
Ctr = A-weighted urban traffic noise.
The acoustic performance of glass is stated with disclosure of the spectrum adaptation terms in brackets after the
RW index as follows: RW (C; Ctr)
Example for 12mm float glass taken from an ISO
performance table is as follows: 34 (0;-2)
Glass performance data may be either in terms of the
RW index alone or the sum of the RW and the relevant spectrum adaptation terms. For example for traffic noise: Rtr = RW + Ctr
Example for 12mm float glass taken from an ISO
performance table is as follows: 34 + (-2) = 32 dB
Note: Refer AS/NZS 1276.1:1999 (ISO 717-1:1996)
Refer ISO 140 series standards.
11.4.7 PERCEIVED SOUND REDUCTION Perceived Sound Reduction
The Perceived Sound Reduction (PSR) table quantifies the perceived reduction in sound as a percentage. The RW index sound reduction values are used to calculate the perceived sound reduction. The perceived sound reduction is a ratio relative to the RW for 3mm float glass.
eg: RW for 3mm float glass is 26dB.
RW for 7mm Soundstop is 36dB.
Reduction in sound pressure level is 10dB.
From the chart a 10dB reduction equates to a 50%
perceived reduction from the original noise.
Note: For Sound Reduction Data refer Section 12.5
Typical Performance Data
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Post by Owen Y on Aug 11, 2017 16:57:26 GMT 12
In short, we take it that that's all for attenuation (you live in a noisy external environment), not for internal absorption? Pics please.
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