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Sound pressure level

Music is a mixture of sound pressure at different frequencies

Sound pressure, or sound pressure level, is the result of the pressure variations in the air achieved by the sound waves. The lowest sound pressure which can be heard by humans is called the hearing threshold, the highest which can be endured is known as the pain threshold. Sound pressure at the pain threshold is a million times greater than that at the hearing threshold. 

To avoid having to process numbers over such a wide range, a compressed, logarithmic scale expressed in decibel (dB)  is used based on the decibel unit (dB). Here the lowest sound pressure level has the value of 0 dB (the hearing threshold) while the pain threshold has the value of approximately 120 dB.  

If the values are added together on a logarithmic scale, the result differs from that on a linear scale. If two equally strong sound sources are added together, the combined sound pressure level does not double but increases by three decibels.   

 

Remember:

  • Sound pressure, or sound pressure level, is the result of the pressure variations in the air achieved by the sound waves

  • The lowest sound pressure which can be heard by humans is called the hearing threshold, the highest which can be endured is known as the pain threshold

  • A compressed, logarithmic scale expressed in decibel (dB) is used based on the decibel unit (dB)

  • If two equally strong sound sources are added together, the combined sound pressure level does not double but increases by three decibels

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Susisiekite su mumis

Saint-Gobain Ecophon AB
Mėnulio g. 7
04326 Vinius

Klientų aptarnavimas:
Telefonas: +370 523 02027
uzsakymai@ecophon.lt 

Pardavimai:
Telefonas: +370 698 35931, +370 615 59565