Menticol
Active Member
Hello guys!
A gal friend of mine is working on a project for newborn babies on incubators. She doesn't have an ETO account so I'll speak on behalf of her. As an industrial designer she projected a type of "cap" equipped with speakers that the newborn will wear during his/her permanence on the incubator. (The idea may sound weird at first, but please note that this is an academic exercise and no real babies will be used for testing).
The following are some samples of the frecuency and magnitude of the noise taken inside the incubator.
Besides of all the ergonomical considerations that she already solved, now she's facing various technological challenges. Excuse me if some data is missing, our audio and electronics knowledge are not very extensive.
1) It's feasible to take the circuitry from a comercial noise-cancelling headphones and installing it on the new set? Or the change in geometry and size of the casing will impair the noise cancelling algorithm inside the processor?
2) What would be the maximum noise reduction theoretically obtainable by a high end headset?
3) She had found some noise cancelling circuits ranging from **broken link removed** to more advanced microcontroller based solutions. Given the frequencies and magnitudes that she's facing, do you think that the first circuit may be modified to be adequate enough?
4) She's aware of the "transfer function" - don't know the exact english translation, the sound that hits other parts of the body like the skull or stomach and travel to the ear. Can you recommend some lecture about the topic? How is measured, and (given the frequency and magnitude of the offending noise) it might be enough to suppress the earphones functionality?
PS: Putting the system on the incubator bed is more technologically practical option, but for some odd reason she's not allowed to modify the bed on any way.
Thank you!
A gal friend of mine is working on a project for newborn babies on incubators. She doesn't have an ETO account so I'll speak on behalf of her. As an industrial designer she projected a type of "cap" equipped with speakers that the newborn will wear during his/her permanence on the incubator. (The idea may sound weird at first, but please note that this is an academic exercise and no real babies will be used for testing).
The following are some samples of the frecuency and magnitude of the noise taken inside the incubator.
Besides of all the ergonomical considerations that she already solved, now she's facing various technological challenges. Excuse me if some data is missing, our audio and electronics knowledge are not very extensive.
1) It's feasible to take the circuitry from a comercial noise-cancelling headphones and installing it on the new set? Or the change in geometry and size of the casing will impair the noise cancelling algorithm inside the processor?
2) What would be the maximum noise reduction theoretically obtainable by a high end headset?
3) She had found some noise cancelling circuits ranging from **broken link removed** to more advanced microcontroller based solutions. Given the frequencies and magnitudes that she's facing, do you think that the first circuit may be modified to be adequate enough?
4) She's aware of the "transfer function" - don't know the exact english translation, the sound that hits other parts of the body like the skull or stomach and travel to the ear. Can you recommend some lecture about the topic? How is measured, and (given the frequency and magnitude of the offending noise) it might be enough to suppress the earphones functionality?
PS: Putting the system on the incubator bed is more technologically practical option, but for some odd reason she's not allowed to modify the bed on any way.
Thank you!
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