Contralateral Ear Occlusion for Improving the Reliability of Otoacoustic Emission Screening Tests

Table 2

DPOAE data from six subjects indicating OAE level recorded with and without occlusion of the contralateral ear in four different ambient sound environments. Results of Student’s 𝑡-test are indicated.

Subject	DPOAE (dB) contra ear plugged	DPOAE (dB) contra ear open	Difference	𝑃 value	Significance
Noise level <25 dB SPL
PAP	10.76	10.77	−0.014	0.937	NO
DAV	9.73	9.66	0.07	0.88	NO
LAR	6.9	6.59	0.3	0.378	NO
ALL	4.38	4.3	0.087	0.625	NO
HAR	3.94	3.62	0.32	0.234	NO
GLU	2.8	1.64	1.165	0.105	NO
Noise level c. 45 dB SPL
DAV	12.56	12.39	0.168	0.457	NO
PAP	8.78	8.56	0.23	0.467	NO
LAR	6.9	6.37	0.53	0.351	NO
HAR	5.48	4.97	0.51	0.66	NO
ALL	5.21	4.58	0.63	0.323	NO
GLU	2.32	2.18	0.148	0.805	NO
Noise level 55 dB SPL
DAV	10.96	10.22	0.74	0.0861	almost
PAP	8.73	7.95	0.777	0.0995	almost
LAR	7.5	6.02	1.48	0.001	YES
HAR	5.68	4.37	1.31	0.153	NO
ALL	4.14	3.21	0.92	0.117	NO
GLU	3.23	2.39	0.84	0.2537	NO
Babble level 55 dB SPL
PAP	10.12	9.13	0.99	0.0061	YES
LAR	7.27	5.7	1.56	0.0481	YES
DAV	6.96	5.5	1.46	0.0054	YES
HAR	4.49	4.03	0.45	0.417	NO
ALL	4.62	3.39	1.23	0.165	NO
GLU	1.62	1.96	−0.34	0.627	NO