Tag: live music

By Marshall Chasin, AuD From time to time in my clinic, a hard-of-hearing performing artist who plays in a rock, jazz, or pop music group will come to me because they’re having difficulty staying on key. And, from time to time, I also see hard-of-hearing audio engineers who have a difficult time with the equalization of their music, either in a live venue or while mixing music in a studio. Here are two clinical suggestions that can help people in both roles improve their ability to monitor their music, and even extend their performing careers. Clinical Suggestion 1: Move Closer to the Bass Player There are many types of music that have “built-in” musical keys that are evident to everyone regardless of their musical training or abilities. Two examples include Celtic music where a bagpipe drone is audible and Hindustani Vedic music where a drone is used. In both of these cases, as long as the drone (a single bass note) is audible, the hard-of-hearing musician can easily “figure out” the key of the music and play those notes and chords that are in that particular key, or in a related key such as its relative minor (e.g. C and A minor). Playing a note with the proper sharps and flats will result in a harmonically pleasant and correct result. (Although my music teacher says that this is a “funky” key whenever I make a mistake, he sort of lets me off the hook, despite me being wrong. Maybe I should ask him to play his bass). For those types of music that do not have an identifiable drone such as Western rock, pop, and jazz music, the bass player is the most important musician in the group. This is the musician who ties everything together and ensures that the music is harmonically optimal. Essentially, the bass line functions as a drone, but unlike in Celtic or Vedic music, the bass line changes as the key or turn-around changes. Increasing the monitoring of the bass player by use of in-ear monitoring, or simply moving closer to the bass player, will provide improved cues regarding the key(s) of the music. This is true for hard-of-hearing musicians as it is for those with normal, or near-normal hearing. Table 1. For a given sensorineural hearing loss in the first column (at 1000 Hz), here are the prescribed target gains (based on FIG6) for 95 dB SPL inputs that are characteristic of live music. Only several dB of gain may be required for these higher input levels. Adapted from Chasin.1 Clinical Suggestion 2: Mix the Music at a Higher Sound Level It is commonplace for a hard-of-hearing audio engineer to have their front-of-house mix or their recording mix viewed as being either too “bright” (too much high frequency boost) or too “dull” (too little high frequency boost). Unfortunately, audio engineering racks are not hearing aids. They only include equalizations that are not level dependent. An equalization may be correct for one sound level, but not for others. In contrast, modern hearing aids can provide amplification (“equalization”) for soft level inputs, medium level inputs, and high-level inputs. However, in many cases a hard-of-hearing sound engineer may only require several decibels of amplification, if any, for high level inputs. In fact, for up to a moderate sensorineural level hearing loss, for high level inputs, 0 dB of amplification may be required.1 This is shown in Table 1, where the first column is the degree of sensorineural loss at 1000 Hz and the subsequent columns are the amount of targeted gain for three differing levels of sound input. Note that for up to a moderate sensorineural hearing loss, for the higher-level elements of music, 0 dB of gain (or equalization) may be all that is required. A useful strategy in order for a hard-of-hearing musician or audio engineer to obtain the correct balance in their music could be to mix (or adjust their equalizer) at a higher sound level at around 80 or 85 Db SPL. Because of the characteristics of equal loudness contours and the natural compensation of the damaged cochlea at higher sound levels, this should provide the audio engineer with the proper mix of the music. Brief exposures to higher levels of music should be quite safe, as the determination of the correct mix/equalization should take minutes, rather than hours. So, hard-of-hearing musicians and audio engineers should make friends with the bass player and not be afraid to mix and determine the front-of-house equalizations at higher sound levels. Photo: Dreamstime Reference Chasin M. Okay, I’ll just say it: Maybe people should just remove their hearing aids when listening to music. Hearing Review. 2012;19(3):74. About the Author: Marshall Chasin, AuD, is an audiologist and the director of auditory research at the Musicians’ Clinics of Canada, adjunct professor at the University of Toronto, and adjunct associate professor at Western University. You can contact him at marshall.chasin@rogers.com.

Tag: live music

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