## acousticreflex_measure.jpg

The image is a page from an academic book titled "Audiology: Science to Practice," authored by Kramer & Brown. The content of this page focuses on acoustic reflex measures and thresholds for normal hearing ears in young adults.

### Table 10-2:
This table provides the mean Acoustic Reflex Thresholds (in dB HL) with Standard Deviation for different frequencies (500 Hz, 1000 Hz, 2000 Hz), as well as for BB Noise. The data is presented in a tabular format:

| Frequency | Ipsilateral Stimulus | Contralateral | 5th-95th %ile |
|-----------|----------------------|---------------|---------------|
| **500 Hz** | 79.9 (5.0)           | 84.6 (6.3)    | 72–90         |
| **1000 Hz**| 82.0 (5.2)           | 85.9 (5.2)    | 75–90         |
| **2000 Hz**| 86.2 (5.9)           | 84.4 (5.7)    | 75–95         |
| **BB Noise**| 64.6 (6.9)           | 66.3 (8.8)    | 55–75         |

The table includes the mean values and their respective standard deviations in parentheses, along with the range of the 5th to 95th percentile.

### Figure 10-21:
This figure illustrates acoustic reflex measures for different levels of the reflex eliciting tone. It shows how the acoustic reflex threshold is defined as the lowest level of the reflex eliciting tone that produces a downward deflection (reduced admittance) ≥ 0.02 mmhos.

The figure includes three scenarios with varying stimulus levels:
1. **80 dB**: No significant deflection.
2. **85 dB**: A slight upward deflection, indicating no clear acoustic reflex.
3. **90 dB**: A clear downward deflection, indicating the presence of an acoustic reflex.
4. **95 dB**: Another clear downward deflection with a larger amplitude.

The figure also includes labels for "Higher" and "Lower," which correspond to the admittance values at different stimulus levels (80 dB, 85 dB, 90 dB, and 95 dB). The threshold level is marked as "At TPP."

### Context:
This page discusses the acoustic reflex test, a common diagnostic tool in audiology. It provides both numerical data on normal hearing thresholds for various frequencies and visual representations of how these thresholds are determined through auditory testing.

There are no people or characters depicted in this image; it focuses entirely on academic content related to audiometry.

This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.