#
Curve Frame Header

Each curve frame contains a header with the following information.

Position | Description
0 | Flag data (format and measurement info)
1 | Flag data (format and measurement info)
2 | Time stamp
3 | Time stamp
4 | Source amplitude in dB * 100
5 | Highest value in dB * 100 (or data length)
6 | RMS out in dB * 100
7 | Noise reduction
8 | Measured data points

The two 16-bit flag words contain information about the curve type and measurement conditions. When parsing this information, first determine the Curve Frame Format. This can be done by examining bits 10-12 of flag 0.

## Curve Frame Format (Flag 0, Bits 10-12)

Bits 10-12 of flag 0 contain the curve frame format:

Value | Description | Data Points
0 | Pure-tone response with distortion | 64 plus 16
1 | Standard composite | 80
2 | Audiometric | 16
3 | (reserved) [was Audiometric] | 32
4 | Variable length | Variable

The next two 16-bit words contain information on the date and time of the measurement. See the Time/Date format topic for more information on parsing this data.

## Related Topics

Audiogram Curve Flags

Response Curve Flags