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Novel bulk acoustic-wave high-Q resonators and acoustically coupled resonator filters have been fabricated and operated at their fundamental half-wavelength mode in the 200-500-MHz frequency range. These structures are fabricated on thin ZnO/silicon diaphragms with dimensions small enough to be incorporated within integrated circuits. Resonator Q’s near 2600 at the fundamental mode have been obtained and strong inter-resonator acoustic coupling has been achieved yielding filters having insertion loss (untuned) as low as 5.5 dB.

In the developing world, there exists a scarcity of services and training in otolaryngology, audiology, and speech therapy, which is reflected by the gap between health care delivery in high-income countries and low-income countries. We surveyed, by questionnaire, the countries of Central America, except for Belize, because of the lack of otolaryngology services, on the following issues: availability of otolaryngology, audiology, and speech therapy services and equipment; otolaryngologist, audiologist, and speech therapist training; and availability of services in rural areas. Surveys were distributed via email and by hand at the 2011 Central American Congress of Otolaryngology, in San Salvador, El Salvador, to otolaryngologists, audiologists, and speech therapists. Not to our surprise, there is a shortfall in services and training in all three professions. The data collected and presented in this commentary will provide a basis by which change might take place.

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