Over-the-Counter Hearing Aids: A Lost Decade for Change

Table 5

Statistical analysis of the OSPL90, HFA FOG, and EIN data between present study and Cheng and McPherson [2] study.

Parameter	Study	Number of testing conditions	Means	value
OSPL 90-peak frequency	Present study	13	1361.5 Hz	0.357
	Cheng and McPherson	16	1193.8 Hz
OSPL 90-peak sound pressure level	Present study	13	124.7 dB SPL	0.653
	Cheng and McPherson	16	125.9 dB SPL
HFA FOG	Present study	13	32.5 dB	0.422
	Cheng and McPherson	16	36.1 dB
EIN	Present study	13	33.1 dB SPL	0.124
	Cheng and McPherson	16	28.4 dB SPL