SPHR 4/588 - Advanced Audiology
dB HL Tutorial

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Perform each of the five following conversion problems. The ANSI reference values for Audiometric Zero (i.e., dB HL) are shown below.

1. We measured a threshold of 30 dB HL at 500 Hz. This value could also be expressed in dB SPL as


 

Frequency (Hz.)
125
250
500
1000
2000
3000
4000
6000
8000
TDH 49,5
47.5
26.5
13.5
7.5
11.0
9.5
10.5
13.5
13.0