Things to Memorize or Review - Exam 2 Audiology TCU Burger

What is dynamic range and what is the formula? What is it for someone with normal hearing?

The Dynamic Range is your personal "volume control" or usable listening space.

It is the gap between:

1. The quietest sound you can barely hear (your threshold).

2. The loudest sound you can stand before it hurts or becomes painfully uncomfortable (your Uncomfortable Loudness Level, or UCL).

\text{Dynamic Range} = \text{Loudest tolerable sound} - \text{Softest audible sound}

• For someone with normal hearing, this range is usually very wide (e.g., 0dB to 100dBHL).

AC masking general formula… when you need to mask

AC of TE - IA > BC of NTE

AC masking formula for headphones

Same as general just -40dB

AC masking forumla for inserts

Same as general just -60dB

BC Masking formula general

ABG of TE > 10dB

What is narrowband noise?

What type of noise is used for bone conduction masking?

Narrowband noise

What is the interaural attenuation for bone conduction?

0dBHL

When masking for bone conduction what is it done by? (Hint what craziness do you look like)

It’s done through air conduction in the other ear

What is overmasking and what is it’s formula?

Overmasking occurs when the masking noise presented to the Non-Test Ear NTE is so loud that it crosses over to the Test Ear TE and produces a masking effect in the TE.

\mathbf{\text{EM NTE} > \text{BC TE} + \text{IA}}