15. Hearing and Speech

* NOTE: Lecture 14: New Methods Applied to Number (student breakout groups—video not recorded) View the complete course: ocw.mit.edu/9-13S19 YouTube Playlist: youtube.com/playlist?list=PLUl4u3cNGP60IKRN_pFptIB…

The fact that someone from Mozambique has access to an MIT lecture from the comfort of their couch is simply mind-blowing. By the way, I was surprised to hear that Professor Nancy has visited Mozambique! Anyways, thank you MIT for giving us access to high quality educational materials for free.

Dear Professor, the claim that nobody had done the reverbs before is not true. Many years ago, I was an acoustic engineer and my field was architectural acoustics. Specifically, I was designing acoustic environment in a room for different purpose e.g. music, speech etc. One of the key properties we study is the reverberation time of the room and there many many measurements of different type of rooms and the fact that sound level decays has been very well known in the field of architectural acoustics. Just thought I’d point it out. Happy to offer more details if you are interested.

It's amazing how little upvotes those lectures have, especially when you compare with other type of videos on youtube. I believe comments help with, so I'm here just to say thank you very much! Give us more high quality content!

Thanks for these free lectures!

Two random ideas off the top of my head about why the primary audio cortex might have two areas for high frequencies. 1. Backup/error detection. It would be evolutionary beneficial to still be able to hear if one side got damaged. 2. Each side might be subtly different, perhaps one side is close to being the true signal and the other is processed in some way. Some form of computation could take both these signals and use this to perform another function such as helping figure out sound direction or perform noise reduction to the signal to help us pick out the sound we're interested in.

Muchas gracias por habilitar los subtítulos en español. Un gran regalo para las personas de habla hispana no bilingües.

Thank you for lectures!

12:04 He asked about the "intensity or volume" and the answer was that it isn't well depicted on that graph. But I would have thought that the graph literally shows the overall loudness by how tall the squiggles are. They show the measured amplitude of the pressure wave at any given time, i.e. loudness/volume.

Thanks for the lecture on the hearing and speech. The study on the vowels and the consonants is very interesting. One falls on the vertical and the other on horizonal in the bar chart. Amazing. Thanks to Dr.Nancy Kan wisher and the MIT.

Great lecture

It is at sulcus I think and the areas of visual spatial, but using the near regions, I have autism spectrum disorder high functioning Asperger's it happens to me, and You helped me to know that.

Amazing

Interesting!

You could think with different parts by focusing on different fields.

Good & nice

I had to take a break at half way. I mean the brain is so amazing at carrying out these seemingly impossible tasks effortlessly... well, ironically, it's very hard to process that.

Very well put lecture although I can’t help myself from asking this question what essentially plays role in Choice of colors attributing to the specific Sounds stimuli is there a hidden psychoanalysis or is it just a random point of time choice 😅. Like the one depicts in Graphs !

#OUTSTANDING

Btw, does anyone know by which mechanism neurons specialize to respond better to certain stimuli and not others (STRFs)? Is it analogous to what happens in deep learning neural networks? ( 54:59)