Influência do zumbido nos limiares auditivos de altas freqüências

Abstract

OBJETIVO: Estudar a influência do zumbido nos limiares auditivos das altas freqüências. MÉTODOS: A amostra foi composta por 30 indivíduos do sexo feminino, com idades entre 19 a 56 anos, sendo 14 com zumbido (grupo estudo) e 16 sem zumbido (grupo controle), todos com limiares tonais de 0,25 a 8 kHz até 25 dB NA. Foram pesquisados os limiares tonais de 9, 10, 12, 14 e 16 kHz. RESULTADOS: Houve diferença estatisticamente significante entre os limiares auditivos de alta freqüência entre o grupo estudo e o controle, sendo piores no grupo estudo. Não foi observada diferença significante entre os limiares auditivos das orelhas direita e esquerda dos indivíduos do grupo estudo, bem como em relação à localização da queixa de zumbido. Observou-se diferença estatisticamente significante entre as médias de idade dos grupos, sendo o grupo estudo composto por pessoas mais velhas. CONCLUSÃO: A pesquisa das altas freqüências apresenta-se como uma alternativa diagnóstica na identificação precoce de perdas auditivas.

The impact of tinnitus on the quality of life in patients with temporomandibular dysfunction

“…Another study 9 showed that bilateral tinnitus was the most frequent in normal hearing patients with TMD. However, in yet another study 34 , there was no significant difference between hearing thresholds for high frequencies in the right and left ears of the individuals in the group with tinnitus when compared to the control group, as well as no significant difference regarding the location of the tinnitus 34 .…”

Limiares de audibilidade de altas frequências em indivíduos adultos normo-ouvintes

“…Research addressing the influence of tinnitus in 30 female individuals aged 19-56 years verified that the higher the frequency assessed, the worse the hearing threshold, both for the group with a complaint of tinnitus and the control group (4) . Therefore, corroborating the aforementioned studies, this result is probably due to cochlear tonotopy, because the higher the frequency, the less stimulation that will reach the basal region of the cochlea responsible for high frequency.…”

“…A survey that analyzed the difference between high-frequency hearing thresholds in 14 individuals aged 19-56 years with a complaint of tinnitus, found no statistically significant difference between the right and left ears, as well as regarding location of the tinnitus complaint (4) . Another research with the objective of analyzing and correlating the audiometric findings at the 9-16 kHz frequencies in 125 adolescents with harmful hearing habits verified neither difference between the ears, nor influence at high frequencies due to exposure to high sound pressure levels (18) .…”

“…HFA can also provide subsidies for speech comprehension difficulties in noisy environments, because high frequencies are necessary for the decoding of speech signals, discrimination of consonant sounds, and recognition of speech (3)(4)(5) . The importance of this study lies on the fact that there has been scientific research using HFA since 1929, with Fletcher as one of the pioneers, introducing it clinically in the early 1960s, showing that hearing impairment could not be detected by conventional audiometry (250 Hz to 8 kHz) alone (3) .…”

“…The importance of this study lies on the fact that there has been scientific research using HFA since 1929, with Fletcher as one of the pioneers, introducing it clinically in the early 1960s, showing that hearing impairment could not be detected by conventional audiometry (250 Hz to 8 kHz) alone (3) . Although the use of HFA has been facilitated in recent years because the marketed audiometers began to incorporate frequencies higher than 8 kHz (4,6) , it is still little used due to lack of literary consensus regarding its results, making knowledge regarding normality and impairment obscure, with studies showing a wide variation of methodologies applied, and also to the fact that most of the results already obtained are responses at the sound pressure level (7) . Several studies indicate that there is still no consensus regarding calibration standards for high frequencies.…”