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Do you hear what I say? You do?
I thought I'd give you a sense of what's happening in this room right now.
I'm talking, and when I talk I push air from my lungs, and so that air goes up
through the neck and there are the vocal cords.
They vibrate and create sound. And this sounds proceeds via the nasal cavity and the oral cavity
creating sound waves that come out into the room.
That's what happens in this room right now.
And in the room there are a lot of ears.
When the sound wave hits your ears, the sound wave goes via the outer ear through and into the inner ear.
And in the inner ear the sound wave converts to electrical impulses. So it goes into the brain
and you hear.
What you hear is not just my voice. it's also what the room does with my voice.
Some of you may think that what I'm saying is interesting. That's when you start listening.
And if the conditions are otherwise good then some of you will remember what I say.
We can not turn off our hearing, it never takes time off. Unfortunately, the sense of hearing is not very modern for it is
adapted to natural sounds in natural environments. And we seldom get to experience that these days.
We have asked students and teachers what they wish to have.
They want better speech perception, less noise and better speak comfort.
"Outdoor environment - a role model for good speech intelligibility"
Another good thing is to have a large part of the teaching outdoors.
For there we have a sound environment that is very good for children.
A couple of weeks ago I was out picking mushrooms in the woods with my son and I noticed that I
could talk to him without raising my voice at very long distances.
Speech perception is influenced by many things. It's affected in part by the speaker's voice, and the listener's ears.
But it is also affected by room acoustics so the voice will be able to reach the listener's ear
Making it easy to listen.
"Sound Reflectors and speech perception"
When I talk to the students, the sound waves from my mouth will meet students' ears once,
and they will hear very clearly what I say. For they will hear these natural
sound waves passing their ears once.
A good way is to bring in a bookcase, fill it with binders and remove every other cover.
Then you get a diffusion effect which is quite similar to the forest. And that is very positive.
"Tips for a better talking comfort"
Then you can insert something that reflects sound above the speaker to so you know you will get back the sound
and get a speaking comfort that is pleasant, so you do not have to raise your voice.
Then we have both speak comfort and speech perception.
"Acoustic strategies for schools"
Stig Arlinger, the professor from Linköping. What was he really saying?
This is what I heard.
But this is what he said.
But he said it in a room where the room allowed vowels to bounce around and come back
and mask the consonants which actually contains all the information.
And are we to overcome this, then you have to, according to me have acoustic strategies,
which is about the teaching method you have, the technical tools you have to teach.
How the building and the room looks. What décor you have.
What training you have to understand how sound affects people.
Winston Churchill said "We shape our buildings and then our buildings shape us."