CNI Bone Conduction Audio System: Difference between revisions
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[[File:skullShakers_closeup.jpg|thumb|Bone-conduction transducers soldered to the cable. The cloth and felt covers are also shown.]] | [[File:skullShakers_closeup.jpg|thumb|Bone-conduction transducers soldered to the cable. The cloth and felt covers have been removed and are also shown.]] | ||
[[File:skullShakers_closerup.jpg|thumb|Close-up of th bone-conduction transducers soldered and hot-glued.]] | [[File:skullShakers_closerup.jpg|thumb|Close-up of th bone-conduction transducers soldered and hot-glued.]] | ||
[[File:newmatic.jpg|thumb|Newmatic audio amplifier.]] | [[File:newmatic.jpg|thumb|Newmatic audio amplifier.]] | ||
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# [http://www.newmaticmedical.com/mri-audio-systems/p/PatientAmplifier/ Newmatic amplifier box] | # [http://www.newmaticmedical.com/mri-audio-systems/p/PatientAmplifier/ Newmatic amplifier box] | ||
# Two [http://www.sonitron.be/site/epag.php?primid=&hid=&subid=&eid=30 Sonitron blue-line transducers]. We build two sizes to accommodate adults and small children-- 41mm and 53mm. I have yet to find a US-source for these, but you can order them from RS Exports ([http://export.rsdelivers.com/product/sonitron/sps-53-t00/piezo-audio-speaker-300hz-20khz-960nf/7868939.aspx 53mm] and [http://export.rsdelivers.com/product/sonitron/sps-41-t00/piezo-audio-speaker-450hz-20khz-880nf/7868935.aspx 41mm]) | # Two [http://www.sonitron.be/site/epag.php?primid=&hid=&subid=&eid=30 Sonitron blue-line transducers]. We build two (three?) sizes to accommodate adults and small children-- 29mm, 41mm and 53mm. I have yet to find a US-source for these, but you can order them from RS Exports ([http://export.rsdelivers.com/product/sonitron/sps-29-t00/sonitron-miniature-speaker-86db-1-%E2%86%92-20-khz-480nf-5-%E2%86%92-60v-32-x-29-x-45mm/7868932 29mm], [http://export.rsdelivers.com/product/sonitron/sps-53-t00/piezo-audio-speaker-300hz-20khz-960nf/7868939.aspx 53mm] and [http://export.rsdelivers.com/product/sonitron/sps-41-t00/piezo-audio-speaker-450hz-20khz-880nf/7868935.aspx 41mm]) | ||
# 3.5mm to dual RCA 10 foot cable (e.g., [http://www.amazon.com/Hosa-Cable-CMR210-Stereo-Adapter/dp/B000068O3B this one from Amazon]) | # 3.5mm to dual RCA 10 foot cable (e.g., [http://www.amazon.com/Hosa-Cable-CMR210-Stereo-Adapter/dp/B000068O3B this one from Amazon]) | ||
# 3.5mm to dual RCA male jack adapters (e.g., [http://www.amazon.com/Monoprice-Premium-Stereo-Female-Plated/dp/B003L14XTO this one from Amazon]) | # 3.5mm to dual RCA male jack adapters (e.g., [http://www.amazon.com/Monoprice-Premium-Stereo-Female-Plated/dp/B003L14XTO this one from Amazon]) | ||
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* Solder each pair of wires to one of the transducers. Keep the paper cover on the back-side of the transducers so the Piezo element is not exposed. | * Solder each pair of wires to one of the transducers. Keep the paper cover on the back-side of the transducers so the Piezo element is not exposed. | ||
* Use hot glue to neatly secure the wires to plastic shell and create a strain-relief. Ensure that all exposed copper and solder is well-insulated. | * Use hot glue to neatly secure the wires to plastic shell and create a strain-relief. Ensure that all exposed copper and solder is well-insulated. | ||
* Cover the transducers with cloth. We use a felt inner-covering and a cloth outer covering, both sewn tight around the transducers. | |||
* Attach the 3.5mm to dual RCA male cable to the Newmatic BNC wires in the scan room. (The BNC T-connector allows you to also connect the Newmatic air-tube transducer if you like.) | * Attach the 3.5mm to dual RCA male cable to the Newmatic BNC wires in the scan room. (The BNC T-connector allows you to also connect the Newmatic air-tube transducer if you like.) | ||
* Plug the 3.5mm male jack on the 10-foot wire into the 3.5mm female. | * Plug the 3.5mm male jack on the 10-foot wire into the 3.5mm female. | ||
Latest revision as of 16:54, 2 June 2017
At the CNI, we have built and maintain an MR-compatible bone conduction audio system. The system is driven by the Newmatic amplifier box.
Parts
- Newmatic amplifier box
- Two Sonitron blue-line transducers. We build two (three?) sizes to accommodate adults and small children-- 29mm, 41mm and 53mm. I have yet to find a US-source for these, but you can order them from RS Exports (29mm, 53mm and 41mm)
- 3.5mm to dual RCA 10 foot cable (e.g., this one from Amazon)
- 3.5mm to dual RCA male jack adapters (e.g., this one from Amazon)
- Two RCA female to BNC male adaptors (e.g., these from Amazon)
- Two BNC all-female T-connectors (e.g., these from Amazon)
- Cloth to cover the transducers
Instructions
- Cut the RCA jacks off of the 10-foot cable.
- Solder each pair of wires to one of the transducers. Keep the paper cover on the back-side of the transducers so the Piezo element is not exposed.
- Use hot glue to neatly secure the wires to plastic shell and create a strain-relief. Ensure that all exposed copper and solder is well-insulated.
- Cover the transducers with cloth. We use a felt inner-covering and a cloth outer covering, both sewn tight around the transducers.
- Attach the 3.5mm to dual RCA male cable to the Newmatic BNC wires in the scan room. (The BNC T-connector allows you to also connect the Newmatic air-tube transducer if you like.)
- Plug the 3.5mm male jack on the 10-foot wire into the 3.5mm female.