Suggest any changes that you could make that will improve the sound quality.
8 Ohm speaker with a 9V battery, this will give 1000W output.
Electronic Circuit
-Draw a circuit diagram of your amplifier design.
Saturday, 8 March 2014
Sound System Design Portfolio (pg14)
How can I improve the design?
Suggest any changes that you could make that will improve the sound quality.
8 Ohm speaker with a 9V battery, this will give 1000W output.
Electronic Circuit
-Draw a circuit diagram of your amplifier design.
Suggest any changes that you could make that will improve the sound quality.
8 Ohm speaker with a 9V battery, this will give 1000W output.
Electronic Circuit
-Draw a circuit diagram of your amplifier design.
Sound System Design Portfolio (pg13)
Modelling
This is a picture of our test circuit for a stereo amp. This picture is of Savannah's circuit because I was away when they completed the circuit.
Test your Design. How well does it work?
The speaker didn't work well at all. The quality of the speaker was horrible. The sound was muffled and not clear, at some points it would buffer and the device would interfere in the connection. You could only control the volume on the device that was playing the music but the speaker doesn't allow it to be played loud. As the volume grows the distortion increases and creates a horrible vibration sound.
Does this Design meet your specifications?
No it doesn't meet my specifications, because one of my specifications were that there needed to be a good amplifier so it could have clear sound and sound really great but this design doesn't do this. It has poor sound and bass. A problem could be that we used the wrong speaker for this circuit and that's why it didn't work well. There was also no speaker enclosure therefore the sound couldn't be absorbed and reflected well.
This is a picture of our test circuit for a stereo amp. This picture is of Savannah's circuit because I was away when they completed the circuit.
Test your Design. How well does it work?
The speaker didn't work well at all. The quality of the speaker was horrible. The sound was muffled and not clear, at some points it would buffer and the device would interfere in the connection. You could only control the volume on the device that was playing the music but the speaker doesn't allow it to be played loud. As the volume grows the distortion increases and creates a horrible vibration sound.
Does this Design meet your specifications?
No it doesn't meet my specifications, because one of my specifications were that there needed to be a good amplifier so it could have clear sound and sound really great but this design doesn't do this. It has poor sound and bass. A problem could be that we used the wrong speaker for this circuit and that's why it didn't work well. There was also no speaker enclosure therefore the sound couldn't be absorbed and reflected well.
Sound System Design Portfolio (pg10)
Research the TDA2822M (IC)
1. What is the purpose of a TDA2822M chip? (what it does)
It is used as an audio power amplifier in portable players and radios.
2. What is the maximum voltage that this IC can handle?
15V
3. How many pins does the TDA2822M have?
Eight pins
4. What is the maximum power dissipation of this IC?
1.4 W of power
5. Create a list of all the components that will be needed to make this stereo amplifier.
1. What is the purpose of a TDA2822M chip? (what it does)
It is used as an audio power amplifier in portable players and radios.
2. What is the maximum voltage that this IC can handle?
15V
3. How many pins does the TDA2822M have?
Eight pins
4. What is the maximum power dissipation of this IC?
1.4 W of power
5. Create a list of all the components that will be needed to make this stereo amplifier.
Component Name
|
Value
|
Quantity
|
Speaker
|
3W , 8Ω
|
2
|
Capacitor
|
0.1µ
|
2
|
Polarised Capacitor
|
100
|
3
|
Polarised Capacitor
|
1000
|
2
|
Fixed Value Resistor
|
4.7 Ω
|
2
|
Sound System Design Portfolio (pg9)
(Video: DIY Portable Stereo Amp)
-Aesthetics
The design of this sound system is balanced but not eye-catching because it was made from an old case but it works for the people who designed it.
-Function
The speakers have clear loud sound which is good. They amplify well and is great for where and what its being used for.
-What electronic device does it connect to?
It connects to a phone or tablet.
-The speakers (rating)
Good sound, taking into consideration where it will be used. The speakers have clear, full sound.
-Amplification
200%
-The enclosure
Not the nicest looking speaker enclosure, but he did reuse something that he didn't need. It is a ported enclosure.
-The IC
LM387
-The power supply
9 V battery
Tuesday, 4 March 2014
Sound System Design Portfolio (pg8)
Research:What design is best for a speaker box?
Sealed speaker box enclosure sealed
Advantages:
*easy to make
*force generated by the air pressure keeps the driver exactly where it’s supposed to be.
*sound that’s produced is tighter and more precise
*improves bass
*can be used in different installations.
Disadvantages:
*amplifier must constantly increase the electrical signal in order to handle the air pressure.
Bandpass enclosure bandpass
Advantages:
*high efficienccy
*provides good bass
*used for increasing gain in bands of frequencies
*increased power handling in the band
Disadvantages:
*large enclosures are hard to design and build
*errors in construction process of making this enclosure
are likely to happen.
Ported enclosure
Advantages:
*high bass out out ported
*less amplifier power needed
*high frequency
*low distortion
Disadvantages:
*larger than sealed boxes
*errors are likely to happen when making this enclosure.
*complex
Sealed speaker box enclosure sealed
Advantages:*easy to make
*force generated by the air pressure keeps the driver exactly where it’s supposed to be.
*sound that’s produced is tighter and more precise
*improves bass
*can be used in different installations.
Disadvantages:
*amplifier must constantly increase the electrical signal in order to handle the air pressure.
Bandpass enclosure bandpass
Advantages:*high efficienccy
*provides good bass
*used for increasing gain in bands of frequencies
*increased power handling in the band
Disadvantages:
*large enclosures are hard to design and build
*errors in construction process of making this enclosure
are likely to happen.
Ported enclosure
Advantages:
*high bass out out ported
*less amplifier power needed*high frequency
*low distortion
Disadvantages:
*larger than sealed boxes
*errors are likely to happen when making this enclosure.
*complex
Sound System Design Portfolio (pg7)
2. It might be possible to make with wood because we have wood at school but i don't really think we have metal so I would have to make the front out of something different, taking into consideration the resources that we have.
3. This design would definitely work because of the materials used and how big the speaker is. I would just change a few things like put the speaker on the front and reduce the size of the volume controller but for this design it works well it just isn't how i'd place speakers and other components.
1. I think the pattern on this sound system is brilliant. I love the way it has an old retro type of look. The user friendliness of this sound system is good because it looks very easy to use but I don't really think the sound will be good because the enclosure of the speakers is small, so the therefore the speakers will be small and won't be powerful.
2. It will be difficult to make this because I don't think we have the resources to make this project at school and I need a speaker that will amplify well and have good bass.
3. I think it will work well for someone who doesn't need a powerful sound system, so for me this design won't work. I just love the rubix cube idea.
1. I love this idea. The proportion and balance of the sound system is excellently done. The two speakers are in the middle next to each other and the handles on top are at equal distances apart so this makes it balanced. The size of the sound system enclosure is perfect. The size of the speakers, the handles all fit on this enclosure which is great. I absolutely love the case for the phone or device to be put in, I like the way it is on top of the enclosure so you can let your phone rest there while playing music and it won't get dirty. This sound system looks strong and durable because of the materials used to make it.2. I can definitely make this at school because it uses wood and we have wood, its also a pretty easy shape to make and there will be lots of room for the amplifier and other components to go.
3. It will work well because there is two speakers and the sound system enclosure is made from wood, the wood will allow the music to absorb and let it amplify well, the phone is in a phone holder case so this will prevent you from putting your phone down on a wet surface or somewhere it can get dirty. For me, I would make the enclosure a little bit smaller so it can be portable but for this person it most probably works for them.
Sound System Design Portfolio (pg5)
Brief Development
The Functional Nature of my design
The speakers will be able to plug into my phone's audio jack and will be able to play music through that. It will have a battery in it that will be able to charge via a USB port and the battery will last for a long time. While playing music there will be LED'S flashing to the beat of the music. The sound system will amplify my music on a huge scale.
The Physical Nature of my design
My sound system will look an old retro type of radio. It will be made from wood in the shape of a rectangular prism. On the front there will be the 100mm diameter speaker and a pattern next to it. The pattern might be a word like FUN with LED'S on that will be flashing to the beat of the music that is playing. By using a word like FUN it will show a bit of my personality on my sound system. At the top of this sound system enclosure there will be a leather type of case where you can put your phone in while playing music so you don't place it on a wet or dirty surface. The audio jack will be placed above the pattern and the volume control will be next to the stereo jack.
A conceptual statement
I'm designing an LED sound system because I need a sound system for home, so I can play music for my friends or family. The LED'S will be in the sound system for a bit of entertainment when at a Braai or Barbeque. It is going to be used for playing music around the house or at a function on the weekend.
Specifications
1. Adjustable volume control is one thing I have to have on my sound system for my neighbours who have just had a baby. They expect me to have it in case the volume gets to loud.
2. My Friends and Family expect it to be portable so we can take it with us where ever we go. Such as on holidays, to a park or to the beach. So I need to make it small but powerful.
3. My Mom expects my sound system to be a part of my room. She wants it to fit in with the theme or colours of my room and it musn't be too big because she doesn't want it to take up too much space.
4. My sound system will need to have a good amplifier so it could amplify my music more than my phone and my sound system needs to have good bass so it will sound more powerful, I will be pleasing everyone with good sound.
The Functional Nature of my design
The speakers will be able to plug into my phone's audio jack and will be able to play music through that. It will have a battery in it that will be able to charge via a USB port and the battery will last for a long time. While playing music there will be LED'S flashing to the beat of the music. The sound system will amplify my music on a huge scale.The Physical Nature of my design
My sound system will look an old retro type of radio. It will be made from wood in the shape of a rectangular prism. On the front there will be the 100mm diameter speaker and a pattern next to it. The pattern might be a word like FUN with LED'S on that will be flashing to the beat of the music that is playing. By using a word like FUN it will show a bit of my personality on my sound system. At the top of this sound system enclosure there will be a leather type of case where you can put your phone in while playing music so you don't place it on a wet or dirty surface. The audio jack will be placed above the pattern and the volume control will be next to the stereo jack.
A conceptual statement
I'm designing an LED sound system because I need a sound system for home, so I can play music for my friends or family. The LED'S will be in the sound system for a bit of entertainment when at a Braai or Barbeque. It is going to be used for playing music around the house or at a function on the weekend.
Specifications
1. Adjustable volume control is one thing I have to have on my sound system for my neighbours who have just had a baby. They expect me to have it in case the volume gets to loud.
2. My Friends and Family expect it to be portable so we can take it with us where ever we go. Such as on holidays, to a park or to the beach. So I need to make it small but powerful.
3. My Mom expects my sound system to be a part of my room. She wants it to fit in with the theme or colours of my room and it musn't be too big because she doesn't want it to take up too much space.
4. My sound system will need to have a good amplifier so it could amplify my music more than my phone and my sound system needs to have good bass so it will sound more powerful, I will be pleasing everyone with good sound.
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