Listening to Music with Cochlear Implants



Cochlear Americas N5 bilateral audio cable connected to the iPod.
For some time now, I’ve heard there are quite a few people struggling to “hear” music clearly through their cochlear’s processor(s).  As I write, I’m currently using my direct audio cable to listen to music on my desktop and the music sounds better through the audio cable than over the use of the speaker.  Before I continue to go on, I would like to note that I am a Cochlear Nucleus 5 user and this is based off of my own personal experiences.

I have six plus years of playing clarinet, one year each for viola, piano, and harmonica.  During my childhood up til teen years I was involved with my hometown church’s Handbell Choir and Children’s Choir for the holiday seasons.  I enjoyed music despite my hearing loss.  During my early 20s, I participated in a couple of local bar gigs with friends playing my clarinet by ear.  How?  It’s all in the count, the beat, the harmonies and the melody.   What was more important was knowing the count, which was how my mother taught me.  Everything else followed.

While I am aware that each cochlear implant company have uniquely different designs, programs and functions, this may or may not apply to some or all of you.  So bare with me here.  When I first got activated, I waited until I could get used to basic sounds and to slowly build up my brain’s recognition of different sounds.  Music is put together with just a simple note and builds up from there into a beautiful song or an award winning masterpiece.  Getting your CI ear to learn the differences between sounds is vital to learning the differences in the sounds of music.  What do I mean? First, pay attention to what sounds come to you easy.  Are they in the low frequency range which is equivalent to a Bass or are they in the mid-frequency range where you can tell the difference in the low to mid-high frequencies  or are they in the high frequency range?  Where do you fall in term of hearing the frequencies?  Now, if the low frequencies come easy, listen to music that has that bass sound, the deep sounds that are low and loud.  Some deep sounds can even be soft but have that bass in it that you can still make out what the words and still have the music playing a bit low in the background.  Choose music with minimal background music to start off.  Some suggestions would be listening to music that have only people singing without music, but you can hear the music in their voices.  If you feel confident move up to music that has a couple of instruments involved and listen to one that stands out to you, over and over again until your CI ear get’s a better idea of what it’s listening to.  Another approach is to go back to your old music that you are familiar with and have it on repeat for about ten to fifteen minutes tops - do this without forcing yourself to listen or else the sounds will not come to you naturally - just simply listen.

One thing many may not be aware of is when you first pick up on the sounds of music you may strain or force yourself to really listen to it and before you know it music doesn’t sound like music.  Just noise.  Do yourself a favor, just relax and take it one step at a time.  It’s like with speech, speech doesn’t come in clear right away, but eventually it does because you were able to listen passively and not actively all the time.  Passive listening is listening without reaction and allowing someone to speak or sing, without interrupting. Not doing anything else at the same time.  This is when you are relaxed.  Active listening is reacting or doing something that demonstrates you are listening and have understood.  So this would be a response to what you heard and writing down information or giving a verbal cue.  The active listening takes place in many different situations.  However, do we always respond back or do we just decide to “just listen” (passive listening)?  Most of the time, many of us are really in a passive listening mode.  We don’t always respond but when we do pick up on something- there is a response which means you were able to go from passively listening to active listening without knowing it.  Now with music, it requires passive listening skills first.  Just allow the music to “flow” to your ears, allow those notes to stream through your auditory processing center of your brain and let your brain get used it it.  So yes, it’s either training or retraining the brain to recognize music notes and sounds before your brain can put it together.  It’s just like learning to recognized speech and environmental sounds.  It’s little by little.

Music is made up of different pitches.  It is also made up with simple to complex sounds.  So understandably music can be a bit difficult to master in terms of listening.  Now, if you don’t have the music background or training, as I mentioned earlier start off simple and with the basics.  If that means listening to children’s music that is played simply to music that is played at a much more complex level, then so be it, it’s a start.  Without the building blocks or musical sounds broken down it can be a challenge.

What helped me was reading the music and playing the keys on a keyboard to hear the differences in notes.  As soon as I got the sounds down, I was able to proceed on my clarinet to know how each note sounded and then play the song.  Each instrument produce different sounds for the same note, this is because of how the instruments are designed and put together.  One same note could have similar pitches but they are slightly different in how they sound. But when played at the same time it like a harmony of different instruments coming together playing just that one note and holding it and it’s rough starting out but then it starts to smooth out.  Harmony is a beautiful sound once you hear it.  Melodies may come easy for some and for others not so much.  However, consider this abstract below:

Cochlear implant melody recognition as a function of melody frequency range, harmonicity, and number of electrodes.

Author information

     1School of Medicine, University of California, Irvine, California 92697, USA.
Abstract

OBJECTIVE:

The primary goal of the present study was to determine how cochlear implant melody recognition was affected by the frequency range of the melodies, the harmonicity of these melodies, and the number of activated electrodes. The secondary goal was to investigate whether melody recognition and speech recognition were differentially affected by the limitations imposed by cochlear implant processing.

DESIGN:

Four experiments were conducted. In the first experiment, 11 cochlear implant users used their clinical processors to recognize melodies of complex harmonic tones with their fundamental frequencies being in the low (104-262 Hz), middle (207-523 Hz), and high (414-1046 Hz) ranges. In the second experiment, melody recognition with pure tones was compared to melody recognition with complex harmonic tones in four subjects. In the third experiment, melody recognition was measured as a function of the number of electrodes in five subjects. In the fourth experiment, vowel and consonant recognition were measured as a function of the number of electrodes in the same five subjects who participated in the third experiment.

RESULTS:

Frequency range significantly affected cochlear implant melody recognition, with higher frequency ranges producing better performance. Pure tones produced significantly better performance than complex harmonic tones. Increasing the number of activated electrodes did not affect performance with low- and middle-frequency melodies but produced better performance with high-frequency melodies. Large individual variability was observed for melody recognition, but its source seemed to be different from the source of the large variability observed in speech recognition.

CONCLUSION:

Contemporary cochlear implants do not adequately encode either temporal pitch or place pitch cues. Melody recognition and speech recognition require different signal processing strategies in future cochlear implants.  (http://www.ncbi.nlm.nih.gov/pubmed/19194298)

As you can see research have been done on this area.  Here is another abstract taken from the same website regarding the effect of age.

Effects of age on melody and timbre perception in simulations of electro-acoustic and cochlear-implant hearing.

Author information

     1Department of Speech, Language, Hearing Sciences, University of Colorado; Boulder, Colorado, USA.
Abstract


OBJECTIVES:
Recent evidence suggests that age might affect the ability of listeners to process fundamental frequency cues in speech, and that this difficulty might impact the ability of older listeners to use and combine envelope and fine structure cues available in simulations of electro-acoustic and cochlear-implant hearing. The purpose of this article is to examine whether this difficulty extends to music. Specially, this study focuses on whether older listeners have a decreased ability to use and combine different types of cues in the perception of melody and timbre.

DESIGN:

A group of older listeners with normal to near-normal hearing and a group of younger listeners with normal hearing participated in the melody and timbre recognition tasks of the University of Washington Clinical Assessment of Music Perception test. The recognition tasks were completed for five different processing conditions: (1) an unprocessed condition; (2) an eight-channel vocoding condition that simulated a traditional cochlear implant and contained temporal envelope cues; (3) a simulation of electro-acoustic stimulation (sEAS) that included a low-pass acoustic component and high-pass vocoded portion, and which provided fine structure and envelope cues; (4) a condition that included only the low-pass acoustic portion of the sEAS; and (5) a condition that included only the high-frequency vocoded portion of the sEAS stimulus.

RESULTS:

Melody recognition was excellent for both younger and older listeners in the conditions containing the unprocessed stimuli, the full sEAS stimuli, and the low-pass sEAS stimuli. Melody recognition was significantly worse in the cochlear-implant simulation condition, especially for the older group of listeners. Performance on the timbre task was highest for the unprocessed condition, and progressively decreased for the sEAS and cochlear-implant simulation conditions. Compared with younger listeners, older listeners had significantly poorer timbre recognition for all processing conditions. For melody recognition, the unprocessed low-frequency portion of the sEAS stimulus was the primary factor determining improved performance in the sEAS condition compared with the cochlear-implant simulation. For timbre recognition, both the unprocessed low-frequency and high-frequency vocoded portions of the sEAS stimulus contributed to sEAS improvement in the younger group. In contrast, most listeners in the older group were not able to take advantage of the high-frequency vocoded portion of the sEAS stimulus for timbre recognition.

CONCLUSIONS:

The results of this simulation study support the idea that older listeners will have diminished timbre and melody perception in traditional cochlear-implant listening due to degraded envelope processing. The findings also suggest that music perception by older listeners with cochlear implants will be improved with the addition of low-frequency residual hearing. However, these improvements might not be comparable for all dimensions of music perception. That is, more improvement might be evident for tasks that rely primarily on the low-frequency portion of the electro-acoustic stimulus (e.g., melody recognition), and less improvement might be evident in situations that require across-frequency integration of cues (e.g., timbre perception). http://www.ncbi.nlm.nih.gov/pubmed/24441739

As you can see, there is more work that needs to be on the cochlear implant simulation.  Since really the primary purpose of the electrode is to hear better in speech and the natural environment, music appreciation comes with patience and time.  While companies are all working to maximize the ability of the electrodes to do better with music, keep it mind how different music and speech are.  I believe the only way to really get to know music is to experience it for ourselves and to take it on like a project, just how we took on speech and environmental sounds as a personal project in the beginning of our new hearing journey.  Don’t be easily discourage however, try using the audio cable (if your cochlear came with one) start with music you are familiar with first and then in a silent room play the same music on speaker.  With speakers you may have to readjust the volume to find your comfort zone and where you feel you pick up more of the lyrics or sounds or both equally!  It really is a learning experience, so take it slow and don’t force it.  Let the music come to you.

***Please note that I did copy and paste from National Center for Biotechnology Information.  If you wish to learn more please feel free to click on the link to follow up.  I am only going off my own experience and interpretation of information I have either read or heard about.  If you wish to correct something I said please feel free to contact me.  Thank you for reading.***

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