CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1 · Question Q24

The magnitude of the threshold of hearing at 1\text{ kHz} is

1. (A)10^{-8}\text{ W m}^{-2}
2. (B)10^{-10}\text{ W m}^{-2}
3. (C)10^{-11}\text{ W m}^{-2}
4. (D)10^{-12}\text{ W m}^{-2}