Jack Harvie-Clark

Out today - Guide to compliance with the noise requirements of Approved Doc O. Jointly published by @ioauk and @TheANC73, ioa.org.uk/news/guidance-… Read more about the background in our blogs apexacoustics.co.uk/category/news/

@cutnoise @willow_peck @KatyKing2 @theheatinghub @heatpolicyrich @janrosenow It would be very interesting to do some modelling for flats. There are so many more variations to consider though - where can we find some flat archetypes or even categories to consider?

@JackH_C @willow_peck @KatyKing2 @theheatinghub @heatpolicyrich @janrosenow Flats need to be done! Your next piece of work?

New report >> Having more than one heat pump running in a terraced street won’t audibly increase noise levels nesta.org.uk/report/air-sou… @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow

@cutnoise @willow_peck @KatyKing2 @theheatinghub @heatpolicyrich @janrosenow I understand that in general the best solution for flats is a communal heating system, and acoustically that's best on the roof, unless the roof is overlooked close by.

More evidence heat pumps are very quiet, actually. businessgreen.com/news/4340777/s…

@ClimateDaily1 @KatyKing2 @JonathanWaxman1 @theheatinghub @heatpolicyrich @janrosenow Most people don't realise that there can be up to 10 dB difference between different manufacturer ASHPs of equivalent heating power.

@willow_peck @KatyKing2 @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow If you read the report you'll see that the 8 dB headline number is not an increase on 42 dBA, as the level from one ASHP was much lower. So although that was the biggest change that we could find in going from one ASHP to many, the numbers are not what you are suggesting.

@KatyKing2 @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow Reading this in summary about increases being 2-8db(A). At 40dB, increase of 10dB is equivalent to DOUBLING noise (as its logarithmic). If policy allows 42db(A)…. +8db, & say another +6dB(A) tonality, I’d suggest there’s a significant risk to rollout. Would welcome challenge.

@willow_peck @KatyKing2 @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow Tonality can't practically be included in this type of assessment - tonality is not measured as part of the Standardised tests, because to do so would require entirely different types of laboratory tests.

@KatyKing2 @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow Struggling to do detailed read on phone so sorry if it’s included/a limitation, but has tonality been factored in? It’s recognised omission of MCS020 that tonality isn’t included. BS4142 acknowledges up to +6dB(A) impact. How does this factor in? Critical friend here as always x

@willow_peck @KatyKing2 @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow We have considered the densest terraced housing scenario, we haven't considered flats - there are many more variables to consider there.

@KatyKing2 @apex_acoustics @theheatinghub @heatpolicyrich @janrosenow Great that more research is coming out. On limitations: - assumes linear housing layout that isn’t universal - “not significantly greater” is a tagline that could be wangled by Jan & the myth crew, & should be handled with care. It is greater, & significance is subjective.

Delighted that our report on the potential for cumulative noise impact from #ASHPs has been published.

@UsueRuiz @jaceksmolicki @Tim4Shaw @walking_sound @BriSoundwalks @landsmith_sarah @a_noisy_silence @DJCdelahaye @NewcastleUniAPL @NCLcreativearts Looking forward to reading it!

Exciting to receive printed copies of Urban Soundscapes this morning! Out to the world 30th April and of interest to all listeners in built environment disciplines. You can read a preview of the book in link below books.google.co.uk/books/about/Ur…

@ThinkSnowflakes @ioauk @Arup @SALacoustics @f_aletta Lots of interesting and challenging questions, which we need to embrace!

Excellent soundscape in practice webinar & discussion by @ioauk, expertly chaired by Adam Thomas @Arup, involving @JackH_C, Peter Rogers @SALacoustics, Martin McVay (Welsh Government) & @f_aletta. So glad there is a great bunch of people driving this work forward &>200 interested

Excited to share that Urban Soundscapes was sent out to print yesterday! With thanks to so many people, including featured interviewees @jaceksmolicki @Tim4Shaw @antoradix @a_noisy_silence @BriSoundwalks @landsmith_sarah @DJCdelahaye @JackH_C #soundscapes #ecoacoustics

@MarkSiddallRIBA @the_woodlouse I'd say the under cut and over cut would be about the same acoustically

@the_woodlouse No idea. @JackH_C may be in a better position to provide a gut instinct. (Overhead is good on bathroom doors as avoids draft risks when wet and in birthday suit.)

Simple door head vent slot.

@jameswoudhuysen @theCCCuk @clim8resistance Thanks for the heads up @jameswoudhuysen! I have responded here: linkedin.com/posts/jack-har… and my comments on the article here: linkedin.com/posts/jack-har…

"With #heatpumps, noise = that of air-conditioners: nasty in winters, particularly when they run through the night." spiked-online.com/2020/12/10/the… @JackH_C is the very acme of #acoustics. But Chris Stark @theCCCuk talked so much to the choir, he never heard the hum @clim8resistance

@sjsprof we are conducting some research about sound in the #Ouseburn, we'd be very grateful to talk to you if possible - can we contact you?

@UKHSA Great to see @UKHSA's work on the adverse effects of #noise & how that is distributed. Road traffic noise receives far too little attention compared with the huge impact it has on so many people's lives. Thank you @sierraclark2 Ben Fenech et al!

High levels of noise can certainly be a nuisance, but it can also have a significant impact on our health. A new study led by UKHSA looks at how noise can affect health and wellbeing. Read more about the study and its finding in our blog: ukhsa.blog.gov.uk/2023/06/29/noi…

@jljcolorado @sierraclark2 @jksmith34 @stephaniegrady0 @EulaliaPeris There aren't health effects from particular sound levels without a context - what type of buildings and situations are you thinking of? There is guidance on noise from building services in CIBSE Guide A or ASHRAE Guides.

@sierraclark2 @jksmith34 @stephaniegrady0 @EulaliaPeris @JackH_C But if I had the noise data, what is the best reference to estimate health effects?

Had an absolute wonderful time presenting on noise burden of disease at the #ICBEN2023 conference in Belgrade, and re-connecting with, and meeting new, environmental health and noise research colleagues! @stephaniegrady0 @EulaliaPeris

@jljcolorado @sierraclark2 @jksmith34 @stephaniegrady0 @EulaliaPeris Depends on the context - biggest health impact is likely to be annoyance, but if you like the noise because it's keeping you safe, it might be the sound of safety.

@sierraclark2 @jljcolorado @jksmith34 @stephaniegrady0 @EulaliaPeris I did quite a lot of digging into manufacturers noise data for the DfE, putting air cleaners into classrooms. Happy to help - What's the question?

@jljcolorado @jksmith34 @stephaniegrady0 @EulaliaPeris I don't have any info on noise from indoor air cleaners, so unfortunately no help there, but @JackH_C who has done work on noise and ventilation systems might have some info?

We're celebrating #EODay by sharing a meal, revisiting our #vision, #mission and #values with the help of Andrew Harrison @coownershipLLP, and then we're going to the #beach!