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Table 1 Comparison of noise attenuation levels of noise-cancelling headphones and TDH-39 supra-aural earphones across frequencies

From: Hearing screening for school children: utility of noise-cancelling headphones

Octave band frequency (Hz)

Noise attenuation of noise-cancelling headphones (dB)*

Typical attenuation of TDH-39 supra-aural earphones (dB)**

Difference in noise attenuation level (dB)

A

B

(A – B)

125

11

3

8

250

11

5

6

500

9

7

2

1000

23

15

8

2000

23

26

−3

4000

35

32

3

8000

33

24

9

  1. * Values of Sennheiser PXC450 noise-cancelling circumaural headphones [51].
  2. * * Values from ISO 8253–1 (1989).