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But can it identify lyrebird's?
by starchand 9y ago
But can it identify lyrebird's?
- stefanRfcx 9y agoThat's a great question. Actually, one of the sounds that are pretty close to a chainsaw are mosquitos that are circling around our microphones due to the Doppler effect. We found ways of dealing with signals that are close to chainsaws by aggregating multiple models and also a time-based analysis. The system can draw causal/correlative conclusions such as a vehicle is usually present before a chainsaw. If there's no vehicle, the likelihood of a chainsaw goes down and the chainsaw model must be highly confident before we sound an alert.
- tonic_section 9y agoHow do you quantify the confidence of your model? Do you use a Bayesian model or just the log-likelihood? Because the latter can act strangely in some cases.
- coolio2657 9y agoI know this is a digression from the current discussion on how well the devices work, but as a stats student who just learned about estimating using log-likelihoods, could you give some more info on how that is inferior to the Bayesian model (since I've heard the exact opposite is true)?
- tonic_section 9y agoThe problem is that neural networks trained using maximum LL do not return calibrated probabilities, using e.g. the softmax output as 'confidence' of a model tends to result in overconfident predictions, take a look at adversarial attacks on neural networks for an extreme example: https://blog.openai.com/adversarial-example-research/ https://blog.openai.com/adversarial-example-research/
- ada1981 9y agoLogger-likelyhood ;)
- mongoosled 9y agoIf a lyrebird is mimicking a chainsaw or truck, wouldn't that indicate the presence of those chainsaws and trucks?
- arbie 9y agoI had to look this up because I though you were jesting. Turns out Lyrebirds can mimic nearly any complex sound: https://youtu.be/VjE0Kdfos4Y https://youtu.be/VjE0Kdfos4Y
- notheguyouthink 9y agoI imagine it would depend on the lifespan, and travel patterns of a lyrebird, no? Eg, bird is making the chainsaw noise weeks or years after the loggers have gone, possibly in an entirely different area.
- osipov 9y agolyrebirds are native to Australia
- emaginniss 9y agoThe swallow may fly south with the sun or the house martin or the plumber may seek warmer climes in winter yet these are not strangers to our land.
- Benofiniquity 9y agoPull the other one!