Table 2.

Characteristics of hypoacusis—BC.

Frequency [Hz]	Before [dB]	After [dB]	t	Difference	p
250	41.22	26.03	4.142	15.19	<0.001
500	48.05	28.68	5.592	19.37	<0.001
1000	49.05	30.52	5.133	18.52	<0.001
1500	69.40	32.72	6.647	36.68	<0.001
2000	52.49	34.86	4.768	17.63	<0.001
3000	56.76	38.11	4.577	18.65	<0.001
4000	54.03	38.67	4.173	15.35	<0.001