When researchers put dosimeters in front of and behind the acoustic shields used by the most exposed players in a working Toronto orchestra pit, the overall attenuation came out at -0.48 dBA, in other words no net reduction at all (Luo et al., Canadian Acoustics 2018). The same two shield models cut 5.8 to 10.7 dBA when a single instrument played into them, and the trumpet at one opera company averaged 93.7 dBA during a full performance of Madama Butterfly. Physical controls in the pit, from screens to risers, keep producing smaller numbers in real use than on the test bench. This roundup focuses on the pit itself: section-by-section exposure, how shields and screens actually perform, and what is left once they fall short. For the wider picture of hearing damage across all genres, see our musician hearing loss and noise exposure statistics. We aggregated data from the UK Health and Safety Executive (HSE), Canadian Acoustics, the Journal of the Acoustical Society of America, the Proceedings of the Institute of Acoustics, the Finnish National Opera exposure study, and other peer-reviewed studies and guidance documents, 18 sources in all.
TL;DR
- Two commercial shields measured in a live Toronto pit gave an overall attenuation of -0.48 dBA (Luo et al., Canadian Acoustics 2018).
- The same shields cut 5.8 to 10.7 dBA when tested with one instrument at a time (Behar et al., Canadian Acoustics 2018).
- Barrier insertion loss fell from 8 to 10 dB in an anechoic room to 3 to 5 dB inside an orchestra (Presbury and Williams, summarized in Eaton and Gillis, Canadian Acoustics 2002).
- Trumpet players averaged 93.7 dBA versus 83.3 dBA for the conductor in the same opera pit (Lee et al., Canadian Acoustics 2003).
- A bassoonist logged a 192.4% sound dose in a single 2 h 13 min Magic Flute dress rehearsal (Dance et al., Proceedings of the Institute of Acoustics 2020).
- Covered orchestra pits add only around 3 dB; the player’s own instrument matters more (Wenmaekers, Eindhoven University of Technology 2017).
- Opera performance levels in one pit ranged from 82.2 dBA (La Traviata) to 89.7 dBA (Elektra) (MacDonald et al., Canadian Acoustics 2008).
- Custom musicians’ earplugs averaged 13.7 dB of real-ear attenuation (Huttunen et al., Noise and Health 2011).
- 80% of professional orchestral musicians who skip hearing protection cite fear that their performance will suffer (Hake et al., Trends in Hearing 2024).
- A 2025 scoping review of 79 studies found hearing loss in 5% to 70% of classical musicians (Firle and Richter, Frontiers in Public Health 2025).
1. Section-by-Section Exposure in the Orchestra Pit
The pit does not expose everyone equally. At the Canadian Opera Company, the trumpet averaged 93.7 dBA during Madama Butterfly while the conductor stood at 83.3 dBA, a gap of more than 10 dB inside the same pit (Lee et al., Canadian Acoustics 2003). The authors traced the higher exposure in that opera to the proximity of the brass and woodwind sections.
The top and bottom of the ranking hold across countries and decades: brass near the top, the conductor at the bottom, with the middle shuffling by repertoire and seating. LAeq here means the equivalent continuous A-weighted sound level, a single average that carries the same energy as the fluctuating music over the measured period. The repertoire matters almost as much as the seat: the same company measured 86.4 dBA for all players in a Rossini opera.
| Metric | Value | Source |
|---|---|---|
| Trumpet vs conductor, average level during Madama Butterfly, Canadian Opera Company pit | 93.7 dBA vs 83.3 dBA | Lee et al., Canadian Acoustics 2003 |
| All players, Madama Butterfly vs The Italian Girl in Algiers | 89.3 dBA vs 86.4 dBA | Lee et al., Canadian Acoustics 2003 |
| Bassoon vs horn (personal badge dosimeters), Magic Flute dress rehearsal pit, London | 93.4 dBA vs 91.8 dBA LAeq | Dance et al., Proceedings of the Institute of Acoustics 2020 |
| Finnish National Opera, performances and group rehearsals vs individual rehearsals | 82 to 99 dB(A) vs 79 to 100 dB(A) | Laitinen et al., Applied Occupational and Environmental Hygiene 2003 |
| Range of average pit levels across five operas, La Traviata to Elektra | 82.2 to 89.7 dBA | MacDonald et al., Canadian Acoustics 2008 |
| Tuba vs cello, mean LAeq over 338 samples in 1 opera and 3 symphony orchestras | 88.6 dB vs 80.4 dB | Pawlaczyk-Luszczynska et al., JOSE 2011 |
Context note: the Polish dataset includes only 25 samples taken in orchestra pits out of 338, which shows how thin pit-specific measurement still is. Most recent available data for pit dosimetry: Dance et al., 2020 (measured in November 2019).
2. Dose: How Fast Pit Players Use Up Their Daily Allowance
A level only becomes a risk once it is multiplied by time. In a single 2 h 13 min Magic Flute dress rehearsal, the bassoonist accumulated a 192.4% sound dose and the hornist 132.9%, against a limit the authors put at 159% (equivalent to 87 dBA at the ear) (Dance et al., Proceedings of the Institute of Acoustics 2020). “Dose” here is the share of the allowed daily sound energy already used up, so anything above 100% of the limit is over.
The contract matters as much as the decibels. Canadian Opera Company musicians worked about 300 hours a year with the company, so MacDonald et al. applied a 93 dBA criterion (they state that 93 dBA for 300 hours equals 85 dBA for 2,000 hours), and both Canadian studies concluded that company work alone did not put players at risk. That conclusion breaks down as soon as players add freelance concerts, teaching or practice on top.
| Metric | Value | Source |
|---|---|---|
| Sound dose, bassoon vs horn, one Magic Flute dress rehearsal (limit set at 159%) | 192.4% vs 132.9% | Dance et al., Proceedings of the Institute of Acoustics 2020 |
| Sound dose for the conductor, measured with a meter beside the podium, same rehearsal | 11.1% | Dance et al., Proceedings of the Institute of Acoustics 2020 |
| Time to reach the UK 85 dB upper exposure action value at 88 dB / 91 dB / 97 dB | 4 hours / 2 hours / 30 minutes | HSE, Sound Advice HSG260, Table 10 |
| Yearly exposure level (LEx), trumpet vs conductor, about 300 hours of company work a year | 84.5 dBA vs 74.2 dBA | Lee et al., Canadian Acoustics 2003 |
| Maximum daily playing time before the allowed exposure is reached, brass vs woodwind (assuming no other noise outside work) | 4.1 hours vs 13.7 hours | MacDonald et al., Canadian Acoustics 2008 |
| Typical daily sound exposure level of an orchestral musician | 80 to 95 dB(A) | Health and Safety Authority Ireland, The Noise of Music 2009 |
Context note: each 3 dB increase doubles the sound energy, which is why the time-to-dose values halve at every step. Most recent available data for the HSE and HSA guidance: 2008 and 2009.
3. Pit Geometry: Overhangs, Space and Venue Design
Pit design sets the baseline before any shield is installed. HSE regards 1.7 square metres per musician as good and calls 1.2 square metres confined, and it recommends 2.5 to 3.5 metres of clearance between the pit floor and any stage overhang (HSE, Sound Advice HSG260). An overhang is the part of the stage that extends over the back of the pit; sound trapped under it has nowhere to go.
The surprise is how modest the covered-pit penalty turns out to be when modelled. Eindhoven research put the sound-intensifying effect of covered orchestra pits at around 3 dB, real but small next to what a trumpet delivers to its own player (IO+, reporting Wenmaekers’ TU Eindhoven research 2017). A move to a larger, less enclosed pit still showed up in the Canadian data: exposure was generally lower in the new opera house, with woodwinds gaining the most.
| Metric | Value | Source |
|---|---|---|
| Floor space per pit musician: regarded as good vs confined | 1.7 m2 vs 1.2 m2 | HSE, Sound Advice HSG260, Sound Advice 7 |
| Added level from playing in a covered orchestra pit | Around 3 dB | Wenmaekers, Eindhoven University of Technology PhD research 2017 (reported by IO+) |
| Deutsche Oper Berlin pit: brass vs all musicians, average level | 93.4 dBA vs 90.0 dBA | Eaton and Gillis, Canadian Acoustics 2002 (review table) |
| Same table, all musicians in two concert-stage orchestras vs the Berlin pit | 89.3 and 90.0 dBA vs 90.0 dBA | Eaton and Gillis, Canadian Acoustics 2002 (review table) |
| Share of musicians in one Gothenburg study who worked in a pit rather than on an open stage | 35% | Axelsson et al. 1981, cited in Eaton and Gillis, Canadian Acoustics 2002 |
Context note: the Berlin comparison suggests pit averages are not always far above stage averages; the brass in the pit, not the pit itself, drives the top of the range.
4. Measured Attenuation of Individual Acoustic Shields
Attenuation is the drop in level from one side of a shield to the other. In 27 paired measurements taken during 10 ballet performances in Toronto, the Wenger shield averaged -2.14 dB and the Manhasset shield 2.67 dB (Behar et al., Canadian Acoustics 2017). A negative value means the level behind the shield, at the protected musician’s ear, was higher than in front of it. The later journal version of the study (Luo et al. 2018) reported an overall attenuation of -0.48 dBA.
The bench and the pit disagree sharply. Tested with one instrument at a time, the same two shield models gave 5.8 to 10.7 dBA (Behar, Abdoli-Eramaki and Mosher, Canadian Acoustics 2018), and a manufacturer-funded anechoic test of a newer design reported about 9.5 dB. Insertion loss, the reduction measured with the barrier in place versus without it, shows the same collapse in older work.
| Metric | Value | Source |
|---|---|---|
| Overall field attenuation, two shield brands, live performances in a Toronto pit | -0.48 dBA | Luo et al., Canadian Acoustics 2018 |
| Average attenuation, Wenger vs Manhasset shield (standard error) | -2.14 dB (0.45) vs 2.67 dB (0.7) | Behar et al., Canadian Acoustics 2017 |
| Sample behind those averages: musicians, performances, paired measurements | 16 musicians, 10 performances, 27 pairs | Behar et al., Canadian Acoustics 2017 |
| Attenuation with a single instrument (trumpet, flute or trombone) as the source | 5.8 to 10.7 dBA | Behar, Abdoli-Eramaki and Mosher, Canadian Acoustics 2018 |
| Goodear shield, overall A-weighted attenuation in an anechoic chamber (funded by the manufacturer) | About 9.5 dB | UTS Tech Lab, Goodear acoustic test 2024 |
| Barrier insertion loss in anechoic conditions vs inside an orchestra | 8 to 10 dB vs 3 to 5 dB | Presbury and Williams, cited in Eaton and Gillis, Canadian Acoustics 2002 |
| Distance from the head within which shields give significant protection | 18 cm | Chasin and Chong, cited in Eaton and Gillis, Canadian Acoustics 2002 |
Outlier note: repeat measurements of the same set-up varied by 2 dBA on average (range 0.4 to 4.0 dBA), which is about as large as the difference between the two shield brands.
5. Why Screens Underdeliver: Physics, Reflections and the Player’s Own Instrument
On paper a polycarbonate shield should do far better. The mass-law estimate for the Toronto shields was around 22 dB at 500 Hz, yet the field result was close to zero (Behar et al., Canadian Acoustics 2017). The mass law is the textbook rule that a heavier panel blocks more sound; it assumes an infinite wall, not a 57 cm by 43 cm sheet that sound simply bends around.
The second problem is the musician’s own instrument. Eindhoven research found that a player’s own instrument contributes about as much sound at the ear as all the other instruments combined, so a screen behind the head cannot touch the dominant source. The third is reflection: HSE states that screens can double the noise exposure of the player to the rear, meaning the musician seated behind a screen and playing into it (HSE, Sound Advice HSG260, Appendix 7). Absorbent facings are the usual fix, which is where porous and perforated materials such as those in our micro-perforated absorber statistics come in, but in the HSE pit case below the gains stayed small.
| Metric | Value | Source |
|---|---|---|
| Mass-law estimate at 500 Hz vs measured overall field attenuation | Around 22 dB vs -0.48 dBA | Behar et al., Canadian Acoustics 2017; Luo et al., Canadian Acoustics 2018 |
| Surface density of the shields vs a highway noise barrier | 7.2 kg/m2 vs 25 kg/m2 | Behar et al., Canadian Acoustics 2017 |
| Level at the ear from the player’s own instrument: trumpet and flute (average, loud passages) vs violin and viola | 95 to 100 dB(A) vs above 90 dB(A) | Wenmaekers, Eindhoven University of Technology PhD research 2017 (reported by IO+) |
| Effect of a screen on the musician seated behind it and playing into it | Can double the noise exposure | HSE, Sound Advice HSG260, Appendix 7 |
| Musical theatre pit 2002: drop in the flautist’s weekly exposure after remedial works | 3 dB, still above the first action level | HSE, Sound Advice HSG260, Sound Advice 7 case study |
Context note: after that 3 dB gain, the case study recommended trialling 30 mm of dense mineral fibre (minimum 60 kg/m3) on each side of the brass/woodwind screen, and a third assessment still found a negligible reduction for the flautist, for whom hearing protection should be available. The 2017 JASA modelling paper by Wenmaekers et al. concluded that risers, extra space and screens at typical positions do not significantly change exposure, and that significant reductions only come from extreme measures its authors called unrealistic. Its abstract reports no single dB figure for screens.
6. Hearing Protection: The Control That Is Left
With shields delivering little, the pit falls back on the ear. Custom-made musicians’ earplugs averaged 13.7 dB of real-ear attenuation at threshold in a sound field, with individual variation of up to 15 dB across frequencies (Huttunen et al., Noise and Health 2011). Real-ear attenuation at threshold (REAT) is measured by comparing the quietest tone a listener hears with and without the plug; it is the closest thing to a lab-grade fit check, a topic covered in our hearing protection fit testing statistics.
More protection is not automatically better. Irish guidance warns musicians to avoid over-protective hearing protection because it may lead them to play louder, and UK guidance lists uniform attenuation earplugs or headphone monitors as the options for pit orchestras. The barrier is acceptance, not supply: among professionals who do protect, most already use customized devices.
| Metric | Value | Source |
|---|---|---|
| Custom musicians’ earplugs, average real-ear attenuation (15 symphony musicians) | 13.7 dB | Huttunen et al., Noise and Health 2011 |
| Ordinary foam earplug, attenuation at 125 Hz vs at 4000 Hz | 25 dB vs almost 40 dB | Health and Safety Authority Ireland, The Noise of Music 2009 |
| Protected musicians using customized solutions, professionals vs amateurs | 84% vs 65% | Hake et al., Trends in Hearing 2024 |
| Non-users who fear their performance will suffer, professionals vs amateurs | 80% vs 32% | Hake et al., Trends in Hearing 2024 |
| Professionals who say hearing protection impedes their performance | 73% | Hake et al., Trends in Hearing 2024 |
Context note: the foam plug figures show why musicians avoid them; a plug that removes almost 40 dB of treble but 25 dB of bass changes the balance the player is trying to hear.
7. Hearing Outcomes and Long-Term Risk for Orchestral Musicians
The outcome data are reassuring in some houses and alarming in others. A 2025 study of Teatro alla Scala orchestra musicians found bilateral hearing impairment in only 3 subjects (2.8%), plus left-ear impairment in four violinists (3.7%), and the authors reported that the UNI ISO 1999:2015 model predicted more noise-induced loss than they observed (Cassina et al., La Medicina del Lavoro 2025). The left ear of a violinist sits right beside the instrument, which is the one-sided pattern exposure data would predict.
Pooled evidence spans an enormous range, which is itself the finding: methods, age correction and definitions differ so much that a single “musician hearing loss rate” is not meaningful. The Polish exposure model, by contrast, ranks the risk by instrument and lands on the same sections that top the pit tables in section 1.
| Metric | Value | Source |
|---|---|---|
| La Scala orchestra musicians with bilateral hearing impairment (PTA above 25 dB HL) | 3 subjects (2.8%) | Cassina et al., La Medicina del Lavoro 2025 |
| La Scala violinists with left-ear (unilateral) hearing impairment | 4 (3.7%) | Cassina et al., La Medicina del Lavoro 2025 |
| Classical musicians: share with hearing loss vs share with a noise notch, across 79 studies | 5% to 70% vs 20% to 50% | Firle and Richter, Frontiers in Public Health 2025 |
| Studies in that review that adjusted audiograms for age | 17 of 79 | Firle and Richter, Frontiers in Public Health 2025 |
| Modelled risk of noise-induced hearing loss after about 40 years of orchestral work | Up to 26%, highest for horn, trumpet, tuba and percussion | Pawlaczyk-Luszczynska et al., JOSE 2011 |
| UK professional musicians reporting hearing loss or other hearing issues; worried about noise at work (N = 693) | 40%; 50% | Greasley et al., Psychology of Music 2020 |
Context note: a noise notch is a dip in the hearing test around 4,000 to 6,000 Hz that is typical of noise damage. Greasley et al. also found that less than a third of respondents had ever had a hearing test, so the 40% is self-reported.
Summary: Orchestra Pit Acoustic Shields by the Numbers
| Metric | Value | Source |
|---|---|---|
| Overall field attenuation of two shield brands in a live Toronto pit | -0.48 dBA | Luo et al., Canadian Acoustics 2018 |
| Wenger vs Manhasset shield, average attenuation in the pit | -2.14 dB vs 2.67 dB | Behar et al., Canadian Acoustics 2017 |
| Same shields with a single instrument as the source | 5.8 to 10.7 dBA | Behar, Abdoli-Eramaki and Mosher, Canadian Acoustics 2018 |
| Barrier insertion loss, anechoic vs inside an orchestra | 8 to 10 dB vs 3 to 5 dB | Presbury and Williams, cited in Eaton and Gillis, Canadian Acoustics 2002 |
| Goodear shield in an anechoic chamber (manufacturer-funded) | About 9.5 dB | UTS Tech Lab, Goodear acoustic test 2024 |
| Distance from the head for significant shield protection | 18 cm | Chasin and Chong, cited in Eaton and Gillis, Canadian Acoustics 2002 |
| Effect of a screen on the musician seated behind it and playing into it | Can double the noise exposure | HSE, Sound Advice HSG260, Appendix 7 |
| Added level from covered orchestra pits | Around 3 dB | Wenmaekers, Eindhoven University of Technology PhD research 2017 (reported by IO+) |
| Trumpet vs conductor, Madama Butterfly pit | 93.7 dBA vs 83.3 dBA | Lee et al., Canadian Acoustics 2003 |
| Bassoon LAeq and sound dose, one Magic Flute dress rehearsal | 93.4 dBA; 192.4% | Dance et al., Proceedings of the Institute of Acoustics 2020 |
| Average pit level, La Traviata vs Elektra | 82.2 vs 89.7 dBA | MacDonald et al., Canadian Acoustics 2008 |
| Maximum daily playing time before the allowed exposure is reached, brass vs woodwind | 4.1 vs 13.7 hours | MacDonald et al., Canadian Acoustics 2008 |
| Finnish National Opera performance and group rehearsal levels | 82 to 99 dB(A) | Laitinen et al., Applied Occupational and Environmental Hygiene 2003 |
| Custom musicians’ earplugs, average real-ear attenuation | 13.7 dB | Huttunen et al., Noise and Health 2011 |
| Professional non-users fearing worse performance | 80% | Hake et al., Trends in Hearing 2024 |
| La Scala musicians with bilateral hearing impairment | 2.8% | Cassina et al., La Medicina del Lavoro 2025 |
| Classical musicians with hearing loss, range across 79 studies | 5% to 70% | Firle and Richter, Frontiers in Public Health 2025 |
Methodology and Sources
- Luo, Pham, Behar, Mosher and Abdoli, Acoustic Shields - A Study of Field Attenuation, Canadian Acoustics 46(1), 2018.
- Behar, Luo, Mosher and Abdoli-Eramaki, Sound Attenuation of Acoustic Shields, Canadian Acoustics 45(3), 2017 (Acoustics Week in Canada proceedings).
- Behar, Abdoli-Eramaki and Mosher, Field Attenuation of Individual Orchestra Shields, Canadian Acoustics 46(3), 2018.
- Eaton and Gillis (Workers’ Compensation Board of BC), Review of Orchestra Musicians’ Hearing Loss Risks, Canadian Acoustics 30(2), 2002, used for the Presbury and Williams, Chasin and Chong, Axelsson and Deutsche Oper Berlin figures it summarizes.
- Lee, Behar, Kunov and Wong, Noise Exposure of Opera Orchestra Players, Canadian Acoustics 31(3), 2003.
- MacDonald, Behar, Wong and Kunov, Noise Exposure of Opera Musicians, Canadian Acoustics 36(4), 2008.
- Dance, Shearer and Zepidou, Sound Exposure of Staff at a Conservatoire, Proceedings of the Institute of Acoustics 42(1), 2020.
- HSE, Sound advice: Control of noise at work in music and entertainment (HSG260), 2008, Sound Advice 7, Appendix 7 and Table 10.
- Health and Safety Authority Ireland, The Noise of Music, 2009.
- Wenmaekers, Nicolai, Hornikx and Kohlrausch, Why orchestral musicians are bound to wear earplugs, Journal of the Acoustical Society of America 142(5), 2017, and IO+, Ear damage caused by the musician’s own instrument, November 2017, reporting Wenmaekers’ Eindhoven University of Technology PhD research.
- UTS Tech Lab, Improving Hearing Protection for Musicians: Testing the Goodear Acoustic Shield, 2024, funded by Goodear and Symphony Services International.
- Laitinen, Toppila, Olkinuora and Kuisma, Sound exposure among the Finnish National Opera personnel, Applied Occupational and Environmental Hygiene 18(3), 2003.
- Pawlaczyk-Luszczynska, Dudarewicz, Zamojska and Sliwinska-Kowalska, Evaluation of Sound Exposure and Risk of Hearing Impairment in Orchestral Musicians, International Journal of Occupational Safety and Ergonomics (JOSE) 17(3), 2011.
- Huttunen, Sivonen and Poykko, Symphony orchestra musicians’ use of hearing protection and attenuation of custom-made hearing protectors, Noise and Health 13(51), 2011.
- Hake et al., A Survey on Hearing Health of Musicians in Professional and Amateur Orchestras, Trends in Hearing 28, 2024.
- Cassina et al., Evaluation of the Hearing Function in the Orchestra Professional Musicians of the Teatro alla Scala in Milan, La Medicina del Lavoro 116(6), 2025.
- Firle and Richter, A scoping review of the prevalence of musicians’ hearing loss, Frontiers in Public Health 13, 2025.
- Greasley, Fulford, Pickard and Hamilton, Help Musicians UK hearing survey: Musicians’ hearing and hearing protection, Psychology of Music 48(4), 2020.
- Data watch: pit-specific shield data is thin and old. The -0.48 dBA (Luo 2018) and the Wenger/Manhasset averages (Behar 2017) come from the same Toronto dataset in two publications, so they are not independent confirmations. The 5.8 to 10.7 dBA range comes from single-instrument tests, not full-orchestra playing, and the UTS figure is an anechoic, manufacturer-funded test. The Presbury and Williams and Chasin and Chong figures are cited through the 2002 Eaton and Gillis review, as the originals could not be retrieved. HSG260 (2008) and the HSA guide (2009) are the most recent available versions; the Association of British Orchestras’ A Sound Ear II guidance (2008) could not be retrieved and was not used. Hake et al. 2024 report slightly different unprotected-time figures in their Results and Discussion, so only their non-conflicting figures are cited here. The Teatro alla Scala abstract does not state its total sample size, and its exposure survey dates from 2011.
- Last updated: October 18, 2026. We update this roundup quarterly, and the next refresh is expected when the full text of the Teatro alla Scala hearing study (La Medicina del Lavoro 2025) and any new peer-reviewed field test of orchestra shields are published.