Luckypants
Filing Flight Plan
Looking for a children's headset that will accomodate a 6 month old, suggestions are appreciated.
Thanks!
Thanks!
(emphasis added)Ear Seal design/comfort: As a second example of design tradeoffs, consider the choices for ear seals and their effect on overall headset performance. The ANR designer needs to have a very good seal to insure a stable acoustic cavity for cancellation. As such, he would like to have an easily conforming material (and probably so would we) that compressed to a small acoustic cavity. If you refer to Section 4 of the ANR 101 series, we discussed various material selections and their effects on attenuation and comfort. Note that the material with the BEST attenuation properties is the WORST for conformability and side pressure requirements. An industrial designer (concerned with fit and comfort) would also point out that increasing the overall depth of the seal IMPROVES ear comfort with greater volume and overall internal size. Larger ear side cavity volume would tend to increase passive performance, but only if the ear seal construction is dense and relatively inflexible. (ouch!!) For comfort's sake, the larger seals are typically constructed with foam that is not a very effective attenuator, offers no real gains (and sometimes losses!) in passive performance.
Design variables relating to the cup size, shape, and how it interfaces to your ears/head are the CENTRAL issues in the headset design and performance. If the design is optimized to be comfortable and effective acoustically, a passive attenuation tradeoff is often made in the ear seal design. A larger, more conforming seal makes for greater wearing comfort and fit with glasses. The ANR designer must also work harder to get good performance and stability in this larger space. As discussed earlier, the allocation of cavity volume effects not only passive attenuation and active performance and also issues like battery life. Large back cavity volumes improve battery efficiencies, but at the expense of ear-side volume and passive attenuation. All these tradeoffs need to be understood and planned into the product so the customer is clear about exactly what his headset is good at! It can't be all things to all pilots.