Question 20N.3.SL.TZ0.6a
| Date | November 2020 | Marks available | [Maximum mark: 2] | Reference code | 20N.3.SL.TZ0.6a |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Outline | Question number | a | Adapted from | N/A |
The hearing threshold is how loud a sound needs to be before an individual can perceive the sound. The chart shows the mean value of the hearing threshold for hearing-impaired individuals before and after receiving a cochlear implant. Normal human speech has a range of loudness of from 50 to 60 decibels (dB).
[Source: This article was published in Brazilian Journal of Otorhinolaryngology, Volume number
81, issue 2, Caixeta Guimarães, A., Machado de Carvalho, G., Duarte, A.S.M., Bianchini, W.A., Bravo Sarasty, A.,
di Gregorio, M.F., Zernotti, M.E., Sartorato, E.L., Menino Castilho, A., Hearing preservation and cochlear implants
according to inner ear approach: multicentric evaluation., pp.190–196 , Copyright Elsevier (2015).]
Outline the effect of the cochlear implant on hearing.
[2]
a. the implant lowered the threshold of hearing
OR
allowed quieter sounds to be heard;
b. the person would be able to hear human speech;
Many candidates correctly stated that the cochlear implant lowered the hearing threshold, but fewer stated it would allow human speech to be heard.
