Actually, while we are on this topic, could I ask the forum members noting differences in sound of equipment, take a note of the room temperature and ideally also humidity so that if someone else perceives a different difference, then at least it can be established if room temperature and humidity might be involved in the perceived differences?
FYI: On the test certificates of GIK Acoustic panels, for the absorption measurements, the temperature of the laboratory is noted on entry and exit of the experiment. After all, some of the absorbed sound is converted to heat.
About 0.17% per °C, so resonant frequency by the same, hence within a probable max 10C variation in living room temp that is 1.7% (so a 100Hz node would change by 1.7Hz).
With RH speed of sound has a smaller change per unit, around 0.036%, but RH in room can vary to a much greater degree, 30-70% being a common range, which gives about 1.5%
So in fact within the range of variation in a room the two have a not dissimilar degree of effect on the speed of sound and hence frequency of resonances etc. i don’t know what I was remembering before raising this - clearly erroneous and I should have checked my facts before posting! I’ve therefore deleted my query
PB was the colourful yardstick by which we measured our neurosis. The jester in the pack. He made everything more interesting and every new tweak could be measured at least against how nuts it was compared to PB nuts.
I am sure companies that shall not be named releasing RCA ground plugs filled with rocks for £1500 were just waiting for PB’s passing so that they could launch their product without punters saying, “That’s PB nuts. No way!”
Congrats ! I knew you were skilful.
As for room temperature, my only experience is that my turntable sounds better when it’s hot. Probably more the cartridge.
I power off the Naim system completely when the humidity hits 70%. Whether the sound is off or I’m off doesn’t really matter, even with AC, there’s no enjoying music beyond that point. I expect this year, it will be humid like this for at least another 6 weeks so I might as well accept defeat and save the electricity.
air pressure is known to affect pitch by slowing or accelerating sound waves accordingly. And Air pressure is often hand in hand with temperature indirectly because warm weather is generally brought in my high pressure and cooler by low pressure.
How audible this is (if at all) I have absolutely no idea. There are some research papers on this on line if anyone cares to search. Though again, discussing this in terms of measurements isn’t immediately obvious to the casual reader if this is really audible or not.
Whilst there can be a perceivable difference of sound waves in air of various temperature, room temperature probably has a greater effect upon the electronic components and equipment.
A calibration certificate for a piece of electronic test equipment would be pretty useless without the ambient temperature also being stated.
Any effect of air temperature, humidity or pressure on sound can be measured - however what can’t (AFAIK) is the effect of the same parameters on our hearing and mental state…
It is interesting that high temperature and humidity can make listening to music at home uncomfortable, but are often part and parcel of many a fantastic live gig experience in small venues!
I haven’t moved. I still live in Japan just like I have for the past 25 years. And it’s still hot and humid all summer. Lately it’s hot enough to sweat the balls off a bull.
You can turn dry mode on the AC but to dry the air it guzzles too much power and makes the room too cold. The trick is to use the AC just right so you can actually think straight and sleep but not set so low going in or out of the house is a shock to the system. So I set it to 26C which is comfortable in summer but not crazy. But even 26C is too much for a listening session if the humidity is hovering above 80%. 26C@80% feels worse than 34C@30%.
Sayonara baby 
