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SoundEasy V28 released - ANSI-CTA-2034 automatic measurements

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  • soongsc
    replied
    Here is another possible application where we are inserting a mic into the ear, and measure the response at the canal entry to simulate where an earbud sound source will be. Using a flat frequency response speaker, we can see how the head and ear may effect the response, and so when calibrating earbud response we can accomplish a more accurate presentation of sound.

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  • soongsc
    replied
    Some detail on the top.

    Click image for larger version  Name:	77C5E5C2-D6BD-4F72-9AD4-B1D08EE217B9.jpeg Views:	0 Size:	797.8 KB ID:	1487808

    The yellow circled parts will be changed to thinner stainless steel parts with countersunk bolts.
    Also note the silicon strips used to prevent slipping of speaker.

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  • soongsc
    replied
    Here is the final design of the single axis rig. Notice a few things:
    1. Added knobs for convenient adjustment.
    2. Expanded base with roller ball feet for convenient moving around. (The whole unit is about 19Kg)
    3. Wires pulling the expansion legs. This prevents the legs from moving around too much.

    The PVC cap at the center of the table is not included, as it is for a different purpose which I will show in a later post.
    Last edited by soongsc; 06-28-2022, 07:12 AM.

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  • soongsc
    replied
    Just getting the final touches to the single axis rig. Should be finished by Tuesday. After posting the final version (minus a built in adjustable support), the second axis and fixtures start to go on. This is going to be a challenging part. Kind of figuring things out as we go along.

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  • JRT
    commented on 's reply
    Also... In case anybody is looking for extruded aluminum structural materials, look at what is available at:
    8020 dot net 

    You can also find similar materials for sale elsewhere. 

    This is not SPAM. I have no affiliation with them,  have no profit motive in this, and it does not directly compete with anything that PE has for sale.

  • bohdan
    replied
    Originally posted by Shonver View Post
    bohdan will you make the RS232 communications specification available, or are you making it exclusive for Soong's turntable?
    Hi Shonver,

    A number of ASCII commands are sent via RS232 link. The commands are specific for Cool Muscle motor. Some of the commands control motor state and settings, and other commands control motor movements. As you can imagine, the whole thing gets a bit complex, because the program controls everything: the MLS measurements, turntable movements and all post-processing of collected data.

    George is planning to create dual-axis turntable device, and this would make things even more complex. This would allow to conduct balloon-style measurements, but the amount of data would be very large.
    Anyway, we'll cross that bridge when we get there.

    I hope I answered your question.

    Best Regards,
    Bohdan

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  • soongsc
    replied
    I browsed through the G code set, it seems like an added layer of coding to decouple the machine from the application. However, it is designed for the complexity of CNC manufacturing. So the commands are not so direct. I am wondering whether such complexity is necessary in just turning a table incrementally. Do they actually transmit the ASCII code?

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  • soongsc
    replied
    Originally posted by Shonver View Post
    Thank you, George. I would recommend considering implementing a G-code option, as that would open up other options to the DIYer community due to the myriad of CNC-based accessories available these days.
    I am not familiar with G-code. As a matter of fact, I did not do any coding, and Bohdan basically sent the command codes in the ASCII format. So he just modified some of his existing RS233 code to get it working. I just figured out how to use off-the-shelf parts as much as possible to get things working. We did look at the ARTA design, but felt we could not figure out what kind of commands they used and how complicated the coding would be. So we used our own design approach.
    Last edited by soongsc; 06-25-2022, 12:37 AM.

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  • Shonver
    replied
    Thank you, George.

    I would recommend considering implementing a G-code option, as that would open up other options to the DIYer community due to the myriad of CNC-based accessories available these days.

    Leave a comment:


  • soongsc
    replied
    Originally posted by Shonver View Post
    bohdan will you make the RS232 communications specification available, or are you making it exclusive for Soong's turntable?
    Hi Shonver, The instruction set is Cool Muscle standard instruction set. If you use their motor, it would be a simple interface. Gear ratio is currently 100:1 in case anyone wishes to do their own design. We hope for more ideas to come out as well as more advanced features in SoundEasy. Whether Bohdan will support multiple interfaces is up to him. We chose this motor because it did not require too much effort on his part, and we thought that this was the easiest way to get the table implemented so that he could focus more on advanced measurement data processing. Hope this answers your question.

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  • Shonver
    replied
    bohdan will you make the RS232 communications specification available, or are you making it exclusive for Soong's turntable?

    Leave a comment:


  • soongsc
    replied
    Originally posted by soongsc View Post
    Here is an update with the lower base expansion added, also added an additional arm to support the loudspeaker. The location of the arm can be adjusted, and the length of the arm will be extended to 30 cm (twice the shown length). Some cleanup of the design is pending some parts to come in.
    A question had been raised whether the base will counter rotate when rotation during measurements or not. Our first impression is that due to the nylon balls used, we are not expecting it to react in such a way due to static friction. But in case it does happen, washers can be placed under the balls to keep it still. These will be provided as part of the kit.

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  • soongsc
    replied
    In case anyone would like to use the turntable to add their own speaker supporting rig, here are the dimensions and specs of the mounting bolts accessible from the top of the table.

    Click image for larger version  Name:	Screen Shot 555.png Views:	0 Size:	446.5 KB ID:	1487442

    And the holes to attach your own expanded bottom.

    Click image for larger version  Name:	Screen Shot 553.png Views:	0 Size:	416.3 KB ID:	1487441

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  • soongsc
    replied
    Here is an update with the lower base expansion added, also added an additional arm to support the loudspeaker. The location of the arm can be adjusted, and the length of the arm will be extended to 30 cm (twice the shown length). Some cleanup of the design is pending some parts to come in.

    Leave a comment:


  • soongsc
    replied
    Hi Heinrich,

    Thank you for the information. Yes, we had looked into the design and was inspired by it. How long did it take for the software to interface with the motor? What turning load did you expect out of the design?

    Regards,
    George

    Leave a comment:

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