/* Emits a 7-Hz tone for 10 seconds.
True story: 7 Hz is the resonant
frequency of a chicken's skull cavity.
This was determined empirically in
Australia, where a new factory
generating 7-Hz tones was located too
close to a chicken ranch: When the
factory started up, all the chickens
Your PC may not be able to emit a 7-Hz tone. */
the wavelength in water (brain matter) of a 7 Hz tone is somewhat over 200 meters. So probably not the skull cavity unless its some kind of chicken themed Godzilla movie.
The problem is likely not the skull but the neck and tendons and stuff oscillating like a bridge.
Edit: you may need to turn up your volume. Much of it (including the first ten seconds) is pretty quiet.
Edit²: I confirm hearing nothing at all using a laptop's built-in speakers; you'll need headphones or external audio.
Is this chart right that the whale calls are up to 180db? https://en.wikipedia.org/wiki/Whale_vocalization#Sound_level... That's enough to blow human ears up.
Also, wow, whales are amazing
Sennheiser HD 600 plugged into my MBP comes in loud and clear (or loud and eerily wobbling bass noise)
It reminds me most of waiting on the platform of a very deep metro line, and hearing the rumbling of a different metro train, some way above.
That, or the (apparently reasonably authentic) sounds played in a Sea Life centre.
They're generally pretty good on the newer models, I think, as laptop speakers go. My 3-word review might be "better than functional". So having heard them make a tolerable go of music and games I was interested to see how they'd manage 52Hz. The answer: badly.
Definetily need headphones for this one.
so much ethno- ego- centric decision making around animals ...
Perhaps the aliens thought that some stupid deaf hunam sent it.
Are there whale species that have calls significantly higher than 50 Hz? Any ungulate experts here who can comment?
Which is a shame. Because if you did, you could engineer Dubstep Whale[tm] after a suitably sophisticated breeding program of additive genetic synthesis.
> As a descriptive term, "ungulate" normally excludes cetaceans (whales, dolphins, porpoises), as they do not possess most of the typical morphological characteristics of ungulates, but recent discoveries indicate that they are descended from early artiodactyls.
However, these calls are produced via an entirely different vocalization method.
See, specifically, the sub-heading on Odontocetes — literally, "toothed whale".
You appear to be operating with the category that "whale" is wholly and exhaustively synonymous with "baleen whale". You're wrong.
"They [whales] are an informal grouping within the infraorder Cetacea, usually excluding dolphins and porpoises. "
I guess I find the blue whale + fin whale hypothesis a little odd (why would the hybrid have a call that's higher in frequency than either of the original species'?), but I don't have the expertise to comment on it.
I don't think this is right. The hybrid with a lion father and tiger mother is the huge one, but the father comes first in the name of the hybrid; tigons (male tiger / female lion) aren't so large.
The reason for the difference is that male lions brand their offspring's DNA with the urge to grow large, while female lions counter with the opposite urge. For a lion/lion pairing, this balances out, but tigers don't have the same war between the sexes going on, and the maternal tiger genetic contribution is defenseless against the paternal lion one.
Humans, by the way, do something similar: the same genetic defect causes "Prader-Willi syndrome" if it came from the father, and "Angelman syndrome" if it came from the mother.
And because it appears to be unable/unwilling to live in a pod with other whales, perhaps due to its inability to communicate with them vocally.
I guess the hardest part to explain (in an artificial source) is how it migrates all the time, not the pitch.
Also, would someone choose to generate AC in a marine application?
If there was a military tech involved (with the source), I highly doubt they would have declassified that or as a conspiracy theory, it is misdirection...
Try getting that past management when all you got is a weird plot on a spectrogram.
Is locating the source that difficult? Don't we have tons of listening/triangulating stuff out in the oceans now?