Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What about radiation at the point where the air tubes are connected to the wires?  doesn't that emit radiation right into your chest area??
Document: When I was searching for an air tube headphone, I settled on this one. I wish I hadn't. I've got nothing positive to say, other than using an air tube stops the radiation path from being close to your ear.Here's why I rate this product so low:- Right out of the package, one of the tubes was crushed because it was sandwiched between the bubble packaging and cardboard backing.- Sound quality is poor, but since this is my first air tube headphone, I can only compare it to standard wired headphones.- I used the headphones for working out, but found that I could never overpower the ambient background music in the gym.- Volume was not equal between both buds.
Perhaps, I wonder if, in an update version, the mic cannot be placed higher. When it's cold outside or rainy, I cannot wear my smartphone on my jacket because the smartphone is not waterproof. This means that the smartphone is worn on my body, under my jacket and the jacket covering the wires (and mic also). If the mic would be placed higher (like around the collar area), I would be able to answer calls more conveniently in such circumstances when I'm outside.The air tubes are quite 'thick' (looks sturdy quality) and give a very crisp and clear sound in both ears.When attaching the 3.5mm jack on my Nokia 625, I had some issues that I still cannot explain.
I have really come to like the air tubes. They are a great hands-free device for your phone and in some crazy way cooler; temperature wise, which is sort of making me consider the radiation thing. Also, you can pick up and hang up on calls with a button on the airtube so it's good for two of my favorite activities, biking and vegging in front of the tv (second fave source of radiation after my cell phone LOL).
Very very bad sound quality when i used it with my phone (Nokia 5800 Xpress Music), the ear pieces hardly stay in your ears & they're irritating, aslo every 10 seconds it stops playing music & prompt the phone to a voice tag, & it seems to be a cheap made.The main problem in the 2 parts is in the lower half (cable with mic & answer control) that's connected to the phone.So the only thing that u can benefit from is the upper part (ear piece with the hollow tubes), i used it instead of the upper part (ear piece) of my "Nokia headphones" to be pluged in the control part which will be pluged in the phone, only in this case it'll give u a good sound + reducing the radiation.
and they are horrible.Its scientifically proven to reduce the electromagnetic radiation that reaches your ear and brain area by up to 98%. FACT - See more at: [...]
The sound quality is great on both ends of conversation. Earbuds are comfortable and don't fall out. I'm so glad to have a headset that doesn't transmit radiation to my head. Just make sure you get the right adapter if you need to go from 3.5 mm to 2.5 mm, otherwise it won't work.
I originally did not get the right connector and could not get the headset to work properly. the company sent me the correct headset connector and it works great. the sound is clear, the headset is light, the ear "plugs" are comfortable and I feel relieved to be getting significantly less cell phone radiation.
Now i don't have to keep my phone near my most prized possession... my brain... and there is no more ear burning sensations. The sound quality is not for music playing, but for phone conversations it works if your volume is set on high. Also, you have to find the right ear piece that  fits to get the best sound quality. It's also not the best for traveling as the tubes make this a bit bulky, but the magnetic tips attaches the buds together to hold around your neck so that helps some.
These air tubes worked very well, good sound, but their life span was very short. A few months of use resulted in breakage of the earbuds and the wiring mechanism. It probably works well for longer periods if used by women and stored in a purse. But for men's use, and storage in pant's pockets, don't expect more than 3 months of good use.
I cannot use a Bluetooth without getting a headache. These air tubes do the trick. I can drive hands free and hear the phone conversation. The ear buds are also easy on my ears. Many others I tried were too big for my ears. I do have to clip the microphone up closer to my chin so my voice can be heard by others but it is pretty easy to do that with the clip.
Answer: I emailed the company that makes this product.  The customer service guy was very helpful.  His response to that question was that there is no radiation threat since the chest area has more tissue, bone, and cartillage, and the brain is not getting the radiation; he said doctors had said that.  He did not say anything  about that little heart shaped piece being shielded.  Being a female, I would prefer not to wear something so close to my chest.  Perhaps, throw the whole thing over my back???