Table 2. Electroacoustic parameter results and comparison.

Electroacoustic Parameters	WHO Recommendation	ANSI CTA-2051	LoCHAid	Met?
Max OSPL 90	100-130 dB SPL	<120 dB SPL	107 dB SPL	Yes
OSPL 90 @ 1kHz	90-124 dB SPL	NS	90 dB SPL	Yes
Average OSPL 90	NS	NS	96 dB SPL
Average Gain	NS	NS	15 dB SPL
Total Harmonic Distortion @ 70dB SPL Input	500 Hz <8% 1000 Hz <8% 1600 Hz <2%	500 Hz <5%	500 Hz = 1% 1000 Hz = 1% 1600 Hz = 1%	Yes
Equivalent Input Noise	<30 dB SPL	<32 dB SPL	40 dB SPL	No
Range of Response and Smoothness	200-8000 Hz Smoothness—NS	250-5000 Hz Smoothness No sharp peaks	<200–>8000 Hz Smooth	Yes
Battery Life	2-3 Weeks	NS	20 days (with 2 AA batteries)	Yes
HFA (1, 1.5, 3 kHz) @ OSPL 90	NS	NS	93 dB SPL
HFA (4,5,6 kHz) @ OSPL 90	NS	NS	103 dB SPL

The table lists the ANSI Parameters (OSPL 90, OSPL 60, Total Harmonic Distortion, High Frequency Average, Average Gain, Max OSPL 90) that were tested on the LoCHAid, the WHO Recommendations Preferred Product Profile (PPP) for the device, the ANSI/CTA-2051 recommendations, and the results from the LoCHAID, and whether the targets were met or not for both sets of recommendations [12, 27]. The device is able to meet all the targets except for Equivalent Input Noise. See Discussion in main text about EIN. *NS = Not Specified.