High-frequency auditory thresholds in normal hearing adults

Oppitz, Sheila Jacques; Silva, Luize Caroline Lima da; Garcia, Michele Vargas; Silveira, Aron Ferreira da

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Sumário

Original Article • CoDAS 30 (4) • 2018 • https://doi.org/10.1590/2317-1782/20182017165 copy

High-frequency auditory thresholds in normal hearing adults

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Purpose

Evaluate high-frequency auditory thresholds, seeking to compare responses between the ears, to verify the correlation between hearing level and aging and analyze frequency responses in normal hearing adults.

Methods

This is a prospective, quantitative, transversal study conducted with a convenience sample. Study participants were 60 individuals aged 18 to 58 years (mean=25.82) with auditory thresholds within normality standards (250-8000 Hz) and normal results in acoustic immittance measurements. High-frequency pure-tone hearing thresholds were determined using an Interacoustics AS10HF audiometer with electrodynamic high-fidelity KOSS R/80 headphones, with thresholds expressed in dBNPS.

Results

Hearing thresholds showed an increase for the right ear with statistical significance at the 10, 11 and 14 kHz frequencies and a tendency to significance at 13 kHz. As of the 14 kHz frequency, a progressive increase directly proportional to the frequency was observed bilaterally, with the thresholds increasing proportionally to age advancement for all frequencies.

Conclusion

High-frequency auditory thresholds progressively increase proportionally to frequency and age advancement in normal hearing individuals, with higher values for the right ear.

Keywords
Hearing; Adult; Auditory Threshold; Audiometry; Normal Hearing Individuals

AC frequency		Mean	Median	SD	CV	Min	Max	N	CI	p-value
9kHz	RE	15.7	15	10.9	70%	0	45	60	2.8	0.263
9kHz	LE	14.3	15	8.7	61%	0	40	60	2.2	0.263
10kHz	RE	16.9	15	10.1	60%	0	65	60	2.6	0.016 ^* * Significant values (p≤0.05);
10kHz	LE	13.9	15	9.5	68%	0	55	60	2.4	0.016 ^* * Significant values (p≤0.05);
11kHz	RE	9.6	5	12.4	129%	0	80	60	3.1	0.006*
11kHz	LE	6.5	5	9.3	143%	0	55	60	2.3	0.006*
12kHz	RE	6.8	0	13.8	203%	0	85	60	3.5	0.156
12kHz	LE	5.6	0	12.2	218%	0	75	60	3.1	0.156
13kHz	RE	14.0	10	19.3	138%	0	115	60	4.9	0.092 ^ Tendency to significance (up to 5 percentage points above the α value adopted)
13kHz	LE	11.8	5	17.5	148%	0	95	60	4.4
14kHz	RE	29.8	25	21.9	73%	0	115	60	5.5	0.028*
14kHz	LE	26.5	20	21.7	82%	0	105	60	5.5	0.028*
15kHz	RE	34.3	30	23.3	68%	0	100	60	5.9	0.510
15kHz	LE	33.1	25	24.2	73%	0	105	60	6.1	0.510
16kHz	RE	45.6	45	21.3	47%	15	100	60	5.4	0.345
16kHz	LE	43.8	37.5	25.1	57%	0	105	60	6.3	0.345
17kHz	RE	58.3	57.5	22.5	39%	10	105	60	5.7	0.534
17kHz	LE	57.2	55	23.1	40%	15	110	60	5.9	0.534
18kHz	RE	70.6	75	21.1	30%	20	105	60	5.3	0.183
18kHz	LE	68.3	70	19.4	28%	30	100	60	4.9	0.183

AC frequency	Mean	Median	SD	CV	Q1	Q3	Min	Max	N	CI
9kHz	15.0	15	9.9	66%	10	20	0	45	120	1.8
10kHz	15.4	15	9.9	64%	10	20	0	65	120	1.8
11kHz	8.0	5	11.0	137%	0	10	0	80	120	2.0
12kHz	6.2	0	13.0	209%	0	5	0	85	120	2.3
13kHz	12.9	10	18.4	142%	0	16.25	0	115	120	3.3
14kHz	28.2	25	21.7	77%	15	40	0	115	120	3.9
15kHz	33.7	30	23.7	70%	15	50	0	105	120	4.2
16kHz	44.7	42.5	23.2	52%	25	60	0	105	120	4.1
17kHz	57.8	55	22.7	39%	40	75	10	110	120	4.1
18kHz	69.5	75	20.2	29%	55	85	20	105	120	3.6

RE		Mean	Median	SD	CV	Min	Max	N	CI	p-value
9kHz	18 to 30 years	14.4	15	10.0	70%	0	40	49	2.8	0.055 ^ Tendency to significance
9kHz	31 to 58 years	21.4	20	13.4	63%	0	45	11	7.9	0.055 ^ Tendency to significance
10kHz	18 to 30 years	15.7	15	7.2	46%	0	30	49	2.0	0.051**
10kHz	31 to 58 years	22.3	20	17.8	80%	0	65	11	10.5	0.051**
11kHz	18 to 30 years	7.1	5	7.0	98%	0	30	49	2.0	0.001 ^* * Significant values (p≤0.05);
11kHz	31 to 58 years	20.5	15	22.6	111%	0	80	11	13.4	0.001 ^* * Significant values (p≤0.05);
12kHz	18 to 30 years	3.9	0	5.6	145%	0	25	49	1.6	<0.001*
12kHz	31 to 58 years	20.0	10	27.3	136%	0	85	11	16.1	<0.001*
13kHz	18 to 30 years	9.9	5	10.4	105%	0	35	49	2.9	<0.001*
13kHz	31 to 58 years	32.3	20	35.0	109%	0	115	11	20.7	<0.001*
14kHz	18 to 30 years	25.1	25	15.3	61%	0	70	49	4.3	<0.001*
14kHz	31 to 58 years	50.9	45	33.2	65%	10	115	11	19.6	<0.001*
15kHz	18 to 30 years	29.1	25	17.1	59%	0	70	49	4.8	<0.001*
15kHz	31 to 58 years	57.7	55	32.4	56%	5	100	11	19.2	<0.001*
16kHz	18 to 30 years	40.6	40	16.5	41%	15	75	49	4.6	<0.001*
16kHz	31 to 58 years	67.7	75	26.4	39%	25	100	11	15.6	<0.001*
17kHz	18 to 30 years	54.2	55	19.0	35%	15	95	49	5.3	0.002*
17kHz	31 to 58 years	76.8	90	27.9	36%	10	105	11	16.5	0.002*
18kHz	18 to 30 years	67.3	70	20.6	31%	20	105	49	5.8	0.011*
18kHz	31 to 58 years	85.0	90	18.0	21%	50	100	11	10.7	0.011*

LE		Mean	Median	SD	CV	Min	Max	N	CI	p-value
9kHz	18 to 30 years	13.2	10	8.2	62%	0	35	49	2.3	0.039 ^* * Significant values (p≤0.05)
9kHz	31 to 58 years	19.1	15	9.4	49%	5	40	11	5.6	0.039 ^* * Significant values (p≤0.05)
10kHz	18 to 30 years	12.4	15	7.0	56%	0	25	49	2.0	0.010*
10kHz	31 to 58 years	20.5	15	15.4	75%	5	55	11	9.1	0.010*
11kHz	18 to 30 years	4.6	5	5.6	121%	0	20	49	1.6	<0.001*
11kHz	31 to 58 years	15.0	10	16.1	107%	0	55	11	9.5	<0.001*
12kHz	18 to 30 years	3.0	0	4.7	158%	0	20	49	1.3	<0.001*
12kHz	31 to 58 years	17.3	10	24.2	140%	0	75	11	14.3	<0.001*
13kHz	18 to 30 years	8.6	5	9.0	105%	0	35	49	2.5	0.002*
13kHz	31 to 58 years	26.4	10	33.8	128%	0	95	11	20.0	0.002*
14kHz	18 to 30 years	21.0	20	14.4	68%	0	60	49	4.0	<0.001*
14kHz	31 to 58 years	50.9	50	31.1	61%	5	105	11	18.4	<0.001*
15kHz	18 to 30 years	27.3	25	18.4	67%	0	65	49	5.2	<0.001*
15kHz	31 to 58 years	58.6	65	30.9	53%	15	105	11	18.3	<0.001*
16kHz	18 to 30 years	37.9	30	20.6	55%	0	80	49	5.8	<0.001*
16kHz	31 to 58 years	70.5	75	26.6	38%	20	105	11	15.7	<0.001*
17kHz	18 to 30 years	52.3	50	20.3	39%	15	95	49	5.7	<0.001*
17kHz	31 to 58 years	78.6	90	23.6	30%	40	110	11	13.9	<0.001*
18kHz	18 to 30 years	64.3	65	17.8	28%	30	95	49	5.0	<0.001*
18kHz	31 to 58 years	86.4	95	16.1	19%	55	100	11	9.5	<0.001*

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[1] Conflict of interests: nothing to declare.