HEAR's principals have also developed a proprietary. low-cost, real-ear attenuation at threshold (REAT) test system for use in hearing protection testing, attenuation labeling per federal regulations, and for product development purposes.  This HEAR LLC REAT test system enables a company to efficiently and inexpensively perform its own in-house NRR and spectral attenuation testing, using a user-friendly, computer-controlled test system that automatically records and stores data, and performs the necessary computations for such metrics as the Noise Reduction Rating (NRR) that is required by the EPA on hearing protector packaging in the U.S.  This system is further described under the "Test Services" heading of this website.

HEAR LLC and its scientists have also been extensively involved in the human factors evaluation and design of auditory alarms for use in various applications.  This has included extensive work on the audibility and directionality (localizability) of vehicular alarms, such as reverse (backup) alarms.  Another example is the work on large process control room alarms, such as those used in refineries.  HEAR scientists have developed a unique, orthogonally-parameterized acoustic alarm design approach.  This approach is geared toward the strategic development of alarms and warning signals that are not only reliably detectable and recognizable, but also provide important coded sound signatures to convey such informational needs as urgency, criticality, and localization.  This alarm design approach can be applied to a client's specific needs, with the final deliverable comprising WAV files (or other desired formats) for the final optimized alarm designs that can be integrated into the client's system for actual use.


8138 Crestridge Rd.

Fairfax Station VA 22039 us


contact: ceo@hear-design.com

HEAR LLC has a strong record of hearing-related device technology development, including receiving several U.S. utility patents for inventions that are applicable to the design of hearing protectors, earphones, hearing aids, and various "hearables."   For instance, HEAR's patented technology for enhancing the comfort and stability of in-ear, custom-fit products, via innovative, low-durometer-device displacement of cartilage in the ear canal (U.S. Patent 7,822,219), has been licensed to a large manufacturer of premium custom-molded hearing protectors, Custom Protect Ear of British Columbia, Canada.  Other technologies for controlling the contact pressure of ear inserts positioned within the ear, and for achieving various spectral profiles of attenuation for different applications (e.g., U.S. Patent 8,550,206), are being further development for use in ultra-comfortable earphone products.  

Company info