My video of acoustics in rooms

We were put into different groups and had to film a student speaking into the camera to test out how different rooms sounded when one person was talking. The first place we went to was the class room which is pretty spacious but still blocked in so when the sound waves came from the persons mouth they still bounced off the walls but weakly because it was a big room. The second place we went to was a lift which is small space so when the person talked it was more clear because the sound waves could bounce off the walls very quickly. The third place we went to was the stairwell this was a very open space so the sound waves were able to travel away without bouncing off anything. The surface properties have a big part in this sound waves would be able to bounce of normal walls but if you put something up on the wall like a notice board then it would soak the waves up and it would not bounce back.

•Different rooms have different acoustics because the size of the rooms and the objects that are in the room.

•https://www.youtube.com/watch?v=NYkdGw36Muc

Recording in room photos for my notes

Soundproof walls

In todays lesson we reverberated the sound of 3 different places.The first place was our class room where we filmed a speach on the camera,the second place was the lift were we filmed another speech in a much small place. The last place was the stairwell which was a very big area.

Sound proof walls are made out of sponge and sorta look like egg cartons. The reason they are made out of sponge is because sponge absorbs all of the sound waves that hit into it.

Microphones

Shotgun mic - Shotgun   
The shotgun mic is used for meeting and interviews this microphone picks up sound from the front of the mic but it also can pick up small sounds for the left, right and back of the microphone. This advantages when the person is speaking from a distance away. This is Directional so it can focus on one person who is talking and not others.

Radio Mic 
Is used for when you want to be filming something far away but you still want to catch the actors noises and words. Prank shows usually use this so the camera man can film and get audio without getting caught. This needs to be done with an omnidirection  so it doesn't matter where you put and you can still get a clear sound.

Pod casting mic These mics are useful in doors as they pick up wind movement really easily. People can use these for radio, live streaming of films and games. This is an omnidirectional microphone.

Decibel lesson

Today we learned about decibels. The class got decibel measures up on  our phones and we recorded the decibel of how much sound the room tone made. The stats or listed above in the graph. We then recorded sound from 6 different positions. The first position turned out to be the loudest because it was the closest to the sound source. The other five dropped in decibels as the sound dropped in energy until the decibel reader reached the room tone.

This is what happens when you spray a bottle of liquid on  something from a short distance away, it focuses on one point of the piece of paper. This works the same for sound waves, the closer it is the better quality.
Spraying a bottle of liquid from a further distance away causes the spray to come out in splatters. Sound waves do the same the further away the sound source is the less clear the audio will be.

Inverse square low of sound means that the decidables drop by 6 every time the distance has decreased by itself.. example.

 1 ,2 ,4 ,8, 16
 -6  -6  -6  -6

Audio notes for media

                                                          MAKING A SPEAKER
Today I made our own little speaker using  card,some coil and magnets. Firstly I rolled up the card using a sharpie pen as a template to make a roll, then I wrapped copper coil around the tube leaving both ends of the coil sticking out I then put magnet in the middle of the tube then I hooked it up to the amp with mini crocodile clips. The music source came from my phone which was connected the amplifier, when we added a cup to the top of the card tube the sound came out louder.    The magnets vibrate creating sound waves that blast out of the card.   The microphone works in the same way the speaker works when the magnets move, for example a megaphone.

Notes on what I have done using Adobe Audition.

Today we have learned how to download songs and sound effects from the internet which are either in Public domain or a creative common.

I have learned how to place music music and sound effects on a multi-track of audition.

I have been able to create a basic mix using 3 sound effects and one song using a variety of methods, I have been showed the 3 ways to change the volume on a multi track:  One way of changing the volume is using the yellow bar, the higher the bar the louder the sound. Another way of arranging the volume is turning the dial on the left side of the track layout. The 3rd way of turning the volume up and down is going the mixer side which Is the place where you can rearrange loads of different things for the sound on the track.