Recent content by IanW

Looks like Newey off to Ferrari, who are likely to make the best engine as that is the Ferrari way. Ferrari did not think that the rules for 2014 for the new powerplant would go ahead so they were a long way behind Merc.

Still for sale.

Thanks for going through a series of analogies. I can see that there is a lot of data available at the macro level but it is extremely difficult / impossible to set up experiments to gather the required data to make more accurate models. Gradually use of data driven statistical models will...

MatthewR, Thanks for the detailed reply. It gives me a better understanding of how you see all this and why you prefer not to engage. I fully understand the need for maths models of systems, as that is my area of expertise in motorsports. Overall I find Economics pretty disappointing in this...

I have just watched the following link which I found interesting and may be of interest to others. In Stephanie Kelton (the Deficit Myth) is asked questions about whether MMT was right about inflation: @matthewr in it she makes a comment that relates back to your comment that you do not see...

6 months ago David Heaton repaired a friend's Audio Synthesis Dax Decade. He said that he had retired but would fix the unit. And yes, [email protected] is the email address that worked for me.

A friend of mine has Mana Soundstages, a Mana Reference Top and I will check whether he has a Sound Tale available. My friend used to post here but gave up a few years ago and so I am advertising some Mana pieces for him. Please PM me exactly what you are looking for.

Still available.

We have slowly develop the prototype speakers stands. A different picture of prototype 1 stand in use in my lounge: Prototype 2 installed in Paul Ogle's (used to post on PFM) lounge with a narrower footprint and springs fully covered in visco elastic material: Prototype 3 installed in...

I assumed that it had a white noise mode? I will investigate further. Need the software to excite the room so that RT60 can be measured over a period of time. Thinking about it a little more you need something to excite the room modes and then a means to measure the energy in frequency...

Yes, all I said was that the main room mode was at 64 Hz (music listening, tone listening and then a pro REW type software used by the acoustician for RT60 decay analysis, over 20 years ago now). Using 1/4 wave Helmholtz absorbers is consistent with 64 Hz in a 5.2m room. My speakers are -6dB...

No, it just means that in my room that is the main room mode, however it is built up, as harmonics or reflections etc. I hadn't really thought about how it is generated until you mentioned this, I just used the measurements and what I heard from a bass tone sweep (originally done with a detailed...

The article focuses on the results of a frequency sweep whereas the unit is really designed to reduce the effect of room modes and hence it is the dynamic room response (RT60) that needs to be assessed. This is also pointed out in one of the early comments below the article.

I was told 50 Hz to 150 Hz was tunable with Helmholtz resonators by the acoustician that I worked with. The lowest frequency mode in my room is 64 Hz and that was fine with this approach. The acoustician tuned the Auditorium at work and Cadogan Hall (and others) with larger diameter and larger...

As I said in another thread regarding vibration isolation, Frank, who I have known outside the forum, for may years does not post here anymore. In terms of F1 car development for performance we use simulations to weight any development areas and assess new ideas, so all developments are...