BS EN 60118-4:1998
$86.31
Hearing aids – Magnetic field strength in audio-frequency induction loops for hearing aid purposes
Published By | Publication Date | Number of Pages |
BSI | 1998 | 10 |
Gives a standard value of magnetic field strength in audio-frequency induction loops for hearing aid purposes that will give an adequate signal-to-noise ratio without overloading the hearing aid.