Nosey: Open-source hardware for acoustic nasalance
This provides a low-cost, customizable alternative for researchers and clinicians needing acoustic nasalance data, though it is incremental as it builds on existing hardware concepts.
The authors tackled the problem of high-cost nasalance measurement by developing Nosey, an open-source, 3D-printed hardware system, which showed consistently higher nasalance scores than a commercial device but comparable contrast magnitudes.
We introduce Nosey (Nasalance Open Source Estimation sYstem), a low-cost, customizable, 3D-printed system for recording acoustic nasalance data that we have made available as open-source hardware (http://github.com/phoneticslab/nosey). We first outline the motivations and design principles behind our hardware nasalance system, and then present a comparison between Nosey and a commercial nasalance device. Nosey shows consistently higher nasalance scores than the commercial device, but the magnitude of contrast between phonological environments is comparable between systems. We also review ways of customizing the hardware to facilitate testing, such as comparison of microphones and different construction materials. We conclude that Nosey is a flexible and cost-effective alternative to commercial nasometry devices and propose some methodological considerations for its use in data collection.