Table 1.

Characteristics of hypoacusis—AC.

Frequency [Hz]	Before [dB]	After [dB]	t	Difference	p
125	48.99	35.33	4.045	13.66	<0.001
250	50.40	35.56	4.928	14.84	<0.001
500	54.67	36.95	5.702	17.71	<0.001
1000	54.20	37.98	5.091	16.21	<0.001
1500	67.38	39.39	5.841	27.98	<0.001
2000	54.57	40.63	4.336	13.95	<0.001
3000	59.76	46.25	3.859	13.51	<0.001
4000	60.07	48.74	3.648	11.32	<0.001
6000	66.19	54.63	3.395	11.56	<0.001
8000	63.84	57.18	2.047	6.66	<0.05