Tag Archives: acoustics

In Phase

Lissajous curve

Lissajous curve

Something which happens to me on a rather regular basis (and about which I blogged before) is that I’ll hear about something right after thinking about it. For instance, if I think about the fact that a given tool should exist, it may be announced right at that moment.

Hey, I was just thinking about this!

The effect is a bit strange but it’s quite easy to explain. It feels like a “premonition,” but it probably has more to do with “being in phase.” In some cases, it may also be that I heard about that something but hadn’t registered the information. I know it happens a lot and  it might not be too hard to trace back. But I prefer thinking about phase.

And, yes, I am thinking about phase difference in waves. Not in a very precise sense, but the image still works, for me. Especially with the Lissajous representation, as above.

See, I don’t particularly want to be “ahead of the curve” and I don’t particularly mind being “behind the curve.” But when I’m right “in the curve,” something interesting happens. I’m “in the now.”

I originally thought about being “in tune” and it could also be about “in sync” or even “matching impedances.” But I still like the waves analogy. Especially since, when two waves are in phase, they reinforce one another. As analogies go, it’s not only a beautiful one, but a powerful one. And, yes, I do think about my sweetheart.

One reason I like the concept of phase difference is that I think through sound. My first exposure to the concept comes from courses in musical acoustics, almost twenty years ago. It wasn’t the main thing I’d remember from the course and it’s not something I investigated at any point since. Like I keep telling students, some things hit you long after you’ve heard about it in a course. Lifelong learning and “landminds” are based on such elements, even tiny unimportant ones. Phase difference is one such thing.

And it’s no big deal, of course. It’s not like I spent days thinking about these concepts. But I’ve been feeling like writing, lately, and this is as good an opportunity as any.

The trigger for this particular thing is rather silly and is probably explained more accurately, come to think of it, by “unconsciously registering” something before consciously registering it.

Was having breakfast and started thinking about the importance of being environmentally responsible, the paradox of “consumption as freedom,” the consequences of some lifestyle choices including carfree living, etc. This stream of thought led me, not unexpectedly, to the perspectives on climate change, people’s perception of scientific evidence, and the so-called ClimateGate. I care a lot about critical thinking, regardless of whether or not I agree with a certain idea, so I think the email controversy shows the importance of transparency. So far, nothing unexpected. Within a couple of minutes, I had covered a few of the subjects du jour. And that’s what struck me, because right then, I (over)heard a radio host introduce a guest whose talk is titled:

What is the role of climate scientists in the climate change debate?

Obviously, Tremblay addressed ClimateGate quite directly. So my thoughts were “in phase” with Tremblay’s.

A few minutes prior to (over)hearing this introduction, I (over)heard a comment about topics of social conversations at different points in recent history. According to screenwriter Fabienne Larouche, issues covered in the first seasons of her “flagship” tv series are still at the forefront in Quebec society today, fourteen years later. So I was probably even more “in tune” with the notion of being “in phase.” Especially with my society.

I said “(over)heard” because I wasn’t really listening to that radio show. It was just playing in the background and I wasn’t paying much attention. I don’t tend to listen to live radio but I do listen to some radio recordings as podcasts. One reason I like doing so is that I can pay much closer attention to what I hear. Another is that I can listen to what I want when I feel like listen to it, which means that I can prepare myself for a heady topic or choose some tech-fluff to wind down after a course. There’s also the serendipity of listening to very disparate programmes in the same listening session, as if I were “turning the dial” after each show on a worldwide radio (I often switch between French and English and/or between European and North American sources). For a while now, I’ve been listening to podcasts at double-speed, which helps me focus on what’s most significant.

(In Jazz, we talk about “top notes,” meaning the ones which are more prominent. It’s easier to focus on them at double-speed than at normal speed so “double-times” have an interesting cognitive effect.)

So, I felt “in phase.” As mentioned, it probably has much more to do with having passively heard things without paying attention yet letting it “seep into my brain” to create connections between a few subjects which get me to the same point as what comes later. A large part of this is well-known in psychology, especially in terms of cognition. We start noticing things when they enter into a schema we have in our mind. These things we start noticing were there all along so the “discovery” is only in our mind (in the sense that it wouldn’t be a discovery for others). When we learn a new word, for instance, we start hearing it everywhere.

But there are also words which start being used by everyone because they have been diffused largely at a given point in time. An actual neologism can travel quickly and a word in our passive vocabulary can also come to prominence, especially in mainstream media. Clearly, this is an issue of interest to psychologists, folklorists, and media analysts alike. I’m enough of a folklorist and media observer to think about the social processes behind the diffusion of terms regardless of what psychologists think.

A few months back, I got the impression that the word “nimble” had suddenly increased in currency after it was used in a speech by the current PotUS. Since I’m a non-native speaker of English, I’m likely to be accused of noticing the word because it’s part my own passive vocabulary. I have examples in French, though some are with words which were new to me, at the time («peoplisation», «battante»…). I probably won’t be able to defend myself from those who say that it’s just a matter of my own exposure to those terms. Though there are ways to analyze the currency of a given term, I’m not sure I trust this type of analysis a lot more than my gut feeling, at least in terms of realtime trends.

Which makes me think of “memetics.” Not in the strict sense that Dawkins would like us to use. But in the way popular culture cares about the propagation of “units of thought.” I recently read a fascinating blogpost (in French) about  memetics from this perspective, playing Dawkins against himself. As coincidences keep happening (or, more accurately, as I’m accutely tuned to find coincidences everywhere), I’ve been having a discussion about Mahir‘s personal homepage (aka “I kiss you”), who became an “Internet celebrity” through this process which is now called memetic. The reason his page was noticed isn’t that it was so unique. But it had this je ne sais quoi which captured the imagination, at the time (the latter part of the “Dot-Com Bubble”). As some literary critics and many other humanists teach us, it’s not the item itself which counts, it’s how we receive it (yes, I tend to be on the “reception” and “eye of the beholder” side of things). Mahir was striking because he was, indeed, “out of phase” with the times.

As I think about phase, I keep hearing the other acoustic analogy: the tuning of sine waves. When a sine wave is very slightly “out of tune” with another, we hear a very slow oscillation (interference beats) until they produce resonance. There’s a direct relationship between beat tones and phase, but I think “in tune” and “in phase” remain separate analogies.

One reason I like to think about waves for these analogies is that I tend to perceive temporal change through these concepts. If we think of historical change through cycles, being “in phase” is a matter of matching two change processes until they’re aligned but the cycles may be in harmonic relationships. One can move twice as fast as society and still be “in phase” with it.

Sure, I’m overextending the analogies, and there’s something far-fetched about this. But that’s pretty much what I like about analogical thinking. As I’m under the weather, this kind of rambling is almost therapeutic.


Audio People of the World: “You, Knight!”

Much to be said about a recent ITConversations podcast episode. Ostensibly, this episode was about the LibriVox success story. (LibriVox is a community project producing public domain audiobooks from public domain books in diverse languages.) Yet, during this conversation, Web analyst (and Microsoft employee) Jon Udell along with LibriVox founder Hugh McGuire managed to share much insight on such varied issues as community-building, project management, grassroots movement, open source development, participatory culture, and aurality/orality.

After the chat, Udell and McGuire followed up, on their respective blogs. Udell developed a useful script to make all LibriVox books into RSS feeds for use in iTunes and other media players. Such a collaboration is an appropriate example of the power of “scratch your own itch” development, described during the podcast conversation. The conversation also prompted Librivox reader Sean McGaughey to describe LibriVox as a killer app. [Update: Blog version of the same description.]

I was led to this podcast episode through a visit to LibriVox reader Kara Shallenberg’s blog. Started listening to the LibriVox podcast after reading about LibriVox on fellow YulBlogger Patrick Tanguay’s own blog. Among other things, LibriVox helped me appreciate Canadian Literature and I’m quite glad that the project may contribute to Montreal’s widespread recognition at the cutting edge of technology and culture.

As an aural learner, I was quite taken by Udell and McGuire’s comments on auditory media. It seems that these two guys really grok what is so neat about sound. At least, their ideas about sound are quite compatible with my own ideas about music, language, and the cultural importance of sound.

We might be in a minority, North Americans who care about sound. Many people (including some online visionaries) seem to care more about visuality. In fact, given the large number of Web designers in the “Web 2.0” movement, it might be said that auditory media have often been considered a subset of “audiovisual content.” Yet there is something to be said about sound standing alone in digital life.

For instance, McGuire and Udell talk about the possibility for people to undertake other activities while listening to audiobooks and other auditory content. Commuting is probably the easiest one to grasp, for most people, and while it might be fun to watch a DVD on a plane or bus, audio podcasts are possibly the ideal “distraction” for (hearing) commuters. Listening to podcasts while moving around has led to very stimulating experiences.

Fans of McLuhan would probably think of “hot” and “cool” media. The difference between video and audio podcasts clearly relates to McLuhan’s ideas about participation.

There’s also the issue of rhythm. While moving images certainly can be rhythmic, speech and musical rhythm seem, to me, to be more readily associated with diverse human activities. No idea where to look for the cognitive side of this but it’s clearly worth investigating.

For lack of a better word, sound is more “abstract” than other sensory experiences. Acoustic signals do have a physical reality but the practise of listening has been used to elicit important ideas about abstract structures in Euro-American aesthetics.

Lots more to talk about but it will do for today.