The status of acoustics in Nigeria: A paper in honour of Professor Alex I. Menkiti

Onuu, Michael U.

doi:10.4314/njphy.v19i1.38135

Cited by 3 publications

(5 citation statements)

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“…They are usually bounded by other service buildings as children units, canteens, book shops, etc, as well as both green and concrete landscaped surroundings. The key acoustic challenges of these auditoriums include their sizes, shapes, material types and finishes used within [8]. Therefore, in a bid to analyse the overall acoustic effect of these buildings, the above mentioned factors and others must be put in proper perspectives (Figure 11).…”

Section: Geometric Forms Of Auditoriums (Shapes)mentioning

confidence: 99%

“…This is due to the fact that reverberation time increases depending on the size of the auditorium. As the size of the auditorium increases, reverberation time could grow beyond acceptable limits [8]. Most church auditoriums in Nigeria have an average ceiling height of 5100mm at the lowest levels while the highest levels are at 3600mm.…”

Section: Geometric Forms Of Auditoriums (Shapes)mentioning

confidence: 99%

“…A wide variety of materials can be applied to the church walls and ceilings depending on your application and environment (Figure 13). The materials mentioned vary in thickness and in shape which distinguishes them from each other on the bases of absorption rating and performance in handling sound within the auditoriums [8].…”

Section: Sound Absorbersmentioning

confidence: 99%

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A Comparative Analysis of Acoustic Material and Effects on Church Auditoriums: Old and New Churches in Nigeria

Itontei¹,

Alibaba²

2015

Int J Adv Tech

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Acoustics is a developing science in Nigeria like elsewhere in the world. However, it is fast gaining popularity as the country is faced with acoustical challenges from industries, road traffic, power generating sets, churches etc, hence the need to proffer solution to the menace. The church auditorium is a space meant for worship, listening and preaching the word of God. This makes it a spiritual environment, that requires serenity to enable the audience hear and understand what is being preached from the alter (stage). A sermon preached in the auditorium should be reasonably loud and clear. It therefore, necessary for an auditorium to be acoustically equipped to ensure clarity of sound within it as failure to do so could promote noise, that can impede hearing. Noise such as echo and reverberation can cause blurring on a speech within a church auditorium, thereby creating difficulties for an effective communication between the listeners and the preacher. The following are two major kinds of noise that could mar good communication in a church auditorium e.g. background noise and acoustic noise. The continuous extraneous noise is called "background" noise, while the echo and reverberation emitted from the loudspeaker and microphones is called "acoustic" noise. This Paper will be critically looking at the use of acoustic materials in the old and new Church auditoriums in Nigeria. It will also provide a brief background of Nigeria's traditional spaces of worship as was created by the vernacular architecture, before the introduction of modern church architecture by the colonialists. It includes an outline of various church architectural Forms and the use of acoustical materials and technology spanning a long period in Nigeria. The Paper actually provides opportunities for critical discussions on the influence of time, knowledge, materials, and economy on the use of acoustic materials in churches in Nigeria. Along the line of discussion, the Paper will draw comparisons between the acoustic performance of auditoriums of the past and present on the basis of materials type used, spatial design arrangement, functionality/comfort and aesthetics. The benefits of this comparative analysis between old and new church auditoriums on the use of acoustic materials and technologies will also not be ignored.

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Section: Geometric Forms Of Auditoriums (Shapes)mentioning

confidence: 99%

Section: Geometric Forms Of Auditoriums (Shapes)mentioning

confidence: 99%

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A Comparative Analysis of Acoustic Material and Effects on Church Auditoriums: Old and New Churches in Nigeria

Itontei¹,

Alibaba²

2015

Int J Adv Tech

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“…A noise induced permanent threshold shift (NIPTS) can occur from a catastrophic noise exposure such as a firecracker exp loding close to one's ear [6]. An inju ry of this type is called an acoustic trauma.…”

Section: Effects Of Noisementioning

confidence: 99%

Simulation of Levels of Noise Generated by Local Grinding Machnies Within the Community (A Case Study of Kaduna Metropolis, Nigeria)

Haruna¹,

Agu²

2012

SCIT

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Levels of noise generated from grinding mach ines were measured. Noise levels as high as 116d B was obtained. These levels of noise can be stressful that can result to fatigue. It is capable of causing temporary and permanent deaf. No ise spectra generated from grinding machines are mixture of lo w and high frequencies. Low and high frequencies noise can have negative effects on memory. The levels of noise generated from these machines are very high and are above the international standard value. Critical investigations showed that some of these machines are old enough to be replaced, lack adequate maintenance and were poorly installed, thereby gave rooms for vibrations. Noise generated from these machines can result to quarrel in the neighbourhood since they are located within the co mmun ity

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“…It has also been reported that community generated noise may have a number of direct/indirect adverse effects on communication, performance, and behaviour; non auditory physiological effects; noiseinduced disturbance of sleep; and community annoyance (Rylander and Dunt, 1977;Osada, 1991;Onuu, 1992;Onuu and Menkiti, 1993;Asuquo, Menkiti, Onuu and Opaluwa, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effects of Exposure to Loud Noise on Hearing on People of Calabar, Cross River State, Nigeria

Asuquo

Onuu

Asuquo

2009

Noise & Vibration Worldwide

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The effects of noise on hearing have been assessed among residents of Calabar, Cross River State, Nigeria, using subjective and objective measures. A 39-item questionnaire was used for the subjective measure. A sample size of 1000 persons in the high noise zones (noise level>80 dB(A)) was randomly selected and used as a study group while 1000 persons in the low noise zones (noise level<50dB(A)) were also randomly selected and used as the control group. Results on Pure Tone Audiometry (PTA) was used to assess the hearing acuity of the respondents and to determine if there was any effect of exposure to loud noise on the hearing of those in the high noise zones. Using a statistical analysis software (SAS), a probability value of 0.0001 (<0.05) and a calculated chi-square (χ2) value of 82.2509 (tabulated χ2=5.22) were obtained. Thus implying that exposure to loud noise does affect hearing of residents in the high noise zones.

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The status of acoustics in Nigeria: A paper in honour of Professor Alex I. Menkiti

Cited by 3 publications

References 0 publications

A Comparative Analysis of Acoustic Material and Effects on Church Auditoriums: Old and New Churches in Nigeria

A Comparative Analysis of Acoustic Material and Effects on Church Auditoriums: Old and New Churches in Nigeria

Simulation of Levels of Noise Generated by Local Grinding Machnies Within the Community (A Case Study of Kaduna Metropolis, Nigeria)

Effects of Exposure to Loud Noise on Hearing on People of Calabar, Cross River State, Nigeria

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