Engineering


30
Oct 09

Contact microphones

Sensors are often a requisite for a successful end product when making a new interface for human-machine interaction. Contact microphones are one of my favourite sensors, and now we have a new batch of them in the workshop.

Contact mics are designed to pick up sound transmitted through hard materials: A contact mic glued to a table will pick up sounds that are made when things hit the table, but not what those around the table talk about.

Glue it on your floor, and make your computer aware of feet, toys, parts hitting your floor. By using a grid of contact mics you can even get a rough approximation on the position of things that are moving around!

Contact mic on my MacBook touch plate

Contact mic on my MacBook touch plate

Cheers
Arve.


27
Sep 09

Active speakers

I have set up a pair of active speakers and a subwoofer in my rehearsal studio: Two dB (dB Technologies) Opera Live 402 fullrange speakers, and one dB Sub15.

This is a setup that is sufficient for small gigs in clubs and such. The 402 speakers are rated at 500+100 watts, the Sub15 is rated 800 watts.

Point is: I sell this stuff, and want you to know about it. If you need speakers, microphones, cables or anything related to this, please contact. I have tested a lot of this for years, and I am confident that the products I sell is high quality, reliable and reasonably priced.

So why buy from Avols? Because Avols is about custom software and hardware. This means that you can buy speakers (and related stuff) and get software and/or hardware made for you and your needs.

You can save a lot of money if we set up a complete system running advanced, good sounding custom software creations for audio processing.

Please contact if you want more info. I will post more about projects that Avols has done in the past to illustrate how we do things.

cheers
Arve


23
Sep 09

Inspiring engineering

I do tend to look around for inspiring engineering stories. This is definitely such an inspiring story. It kind of sums up what I think engineering should be all about from early schooldays to higher education: It is all about making things that you need, without being stopped by lack of money, materials or what other people think about what you are making.

I also like this example beacause it is a striking parallel to the everyday concern about not having enough electricity/power in the industrialized parts of the world.

cheers
Arve


29
Jun 09

Mathematics

When I studied engineering (electronics) during my Masters thesis in Musicology, it took about one week to figure out that Calculus was not what I was going to use my time on. This was discussed with my lecturers in electronics and programming, and to my surprise they agreed.

Thanks to the people in the administration of that particular university college (Høgskolen i Vestfold) I could quit those topics that was looked upon (by me that is) as not so very relevant, and go for those topics that I needed, and still need.

I do indeed need math and physics, but books and links are more efficient than hours of irrelevant math-lectures. To me it seems like some math professionals love the fact that their topic is hard for students, in fact so hard that many students can’t get through exams. Ego. Many students, me being one of them, has to put more effort into irrelevant math than any other topic, only to get through a c(o)urse that we do not need. This is not because we are stupid, but because logic strikes hard when time is spent on something we do not need…. This is, in my opinion, not right.

I am  almost out on a rant here, so I’ll keep it simple: Those who teach mathematics in the irrelevant manner, should know better. Keep it relevant!

Now I have found someone who can speak out with authority and put things where they belong: Please – if you find math interesting that is – have a look at this presentation over at Ted’s.

Cheers
Arve.


19
Mar 09

I have this flag that I carry around.

In fact it is a link: http://managinghumans.com/. I do not want to say more about it. I just think that anyone who make stuff for humans should read it.

cheers
Arve