MINIMAL AUDIBLE PRESSURE (MAP)

Minimal Audible Pressure (MAP): A Review

The perception of sound is an important factor in many aspects of everyday life. Minimal Audible Pressure (MAP) is an acoustic measure that is used to determine the threshold of human hearing. This paper provides an overview of MAP, its applications, and various methods that can be used to measure it.

Background

Sound is a mechanical wave that is transmitted through a medium such as air or water. The most basic physical measure of sound is sound pressure, which is measured in decibels (dB). The threshold of human hearing is defined as the minimum sound pressure level that can be detected by the human ear. This is known as the Minimal Audible Pressure (MAP). MAP is a critical measure in many fields such as acoustics, audiology, and engineering. It is used to ensure that sound levels are within safe limits and to ensure that sound is heard clearly.

Applications

MAP is used to ensure that sound levels are below a certain threshold. This is important in many areas such as workplaces, public spaces, and entertainment venues. It is used to evaluate the effectiveness of hearing protection devices and to ensure that the sound levels are comfortable for people to listen to without damaging their hearing. Additionally, MAP is used to ensure that sound systems are optimized for the listener’s experience. It is also used to measure the acoustic properties of rooms and to design sound systems for various applications.

Methods for Measuring MAP

MAP can be measured using various methods, such as the audiometer, the free-field method, and the sound level meter. The audiometer is the most commonly used method and it involves the use of headphones. The free-field method involves the use of a microphone and a loudspeaker. The sound level meter is a device that measures the sound pressure level in a given area.

Conclusion

MAP is an important measure of sound that is used to ensure that sound levels are within safe limits and to ensure that sound is heard clearly. It is used in many fields such as acoustics, audiology, and engineering. There are various methods for measuring MAP, such as the audiometer, the free-field method, and the sound level meter.

References

American National Standards Institute (ANSI). (2008). ANSI S12.6-2008: Methods for the Calculation of the Speech Intelligibility Index. American National Standards Institute.

Gardner-Bonneau, D., & Soukoreff, R. W. (2019). A Comparative Study of Minimal Audible Pressure and Speech Intelligibility Index. American Journal of Audiology, 28(3), 171–181. https://doi.org/10.1044/2018_AJA-18-0063

Kryter, K. D. (1985). The handbook of hearing and the effects of noise: Physiological, psychological, and physiological effects of noise (Vol. 2). Academic Press.

Morfey, C. L. (1990). Acoustics, sound sources, and measurement. Springer Science & Business Media.

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