![]() ![]() The Delta Zulu is priced at $1,099, $200 more than the Zulu 3. ![]() Or at least on airplanes with heater muffs wrapped around exhaust pipes, which is the typical setup for cabin heaters on single-engine airplanes. Having the Kanari carbon monoxide detector along for the ride was a clear bonus and makes me wonder why proper detectors aren’t mandatory on all piston-powered airplanes. The Lightspeed headset did feel like it had less clamping pressure on my head, and I liked the way it easily accommodated my eyeglasses without feeling like they were being forced against my head. As mentioned, I wasn’t able to perceive a distinct difference in hearing quality between the two headsets. On both flights, I swapped between the Lightspeed and a Bose A20 ANR headset to try to compare them. I flew with the Delta Zulu headset on two flights, one in a Cessna 172 and another in a Daher Kodiak 900 single-engine turboprop. One couple I tested clearly illustrated why the husband couldn’t hear the wife and vice versa, as their optimum frequencies were completely opposite. Women who tried the test generally had better hearing at the higher frequencies. For each frequency, the user has to adjust a volume slider in the app until the sound is barely perceptible.Īs I suspected, my hearing drops off at the higher frequencies, and this proved almost universal in men that I tested with HearingEQity. The hearing test assesses the user’s hearing, running each ear through 12 different low-to-high frequencies. Once completed, the audio equalization system sets the hearing level in each ear cup “to create your individual hearing profile to compensate for any hearing variations between ears,” according to Lightspeed. With the HearingEQity audio equalization system, pilots can run a 12-frequency hearing test while wearing the Delta Zulu headset connected via Bluetooth to the app, obviously not while flying. The headset’s audible alerts warn when it detects CO above caution and critical levels (10-50 and 50-100 ppm, respectively), but pilots can also view CO levels and history on the Lightspeed app. Lightspeed’s Kanari “smart alert technology” sensor measures carbon monoxide (CO) levels in the wearer’s vicinity. This iteration of the Delta Zulu includes the first of what might be multiple sensors that add capabilities and make the headset a platform rather than just something that enhances hearing in noisy cockpits. Standard features include Bluetooth connectivity for telephone calls on the ground or listening to music. The Delta Zulu headset comes with a rechargeable battery pack that lasts up to 30 hours, and this can be swapped out with an alkaline battery pack. ![]()
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