# SoftBank Robotics documentation What's new in NAOqi 2.8?

# Sonars

## Specification

The robot is equipped with two ultrasonic sensors (or sonars) which allow it to estimate the distance to obstacles in its environment.

Sonar: 2 actuators, 2 sensors.

Frequency | 42kHz
Sensitivity | -86dB
Resolution | 0.03 m
Detection range | 0 * - 5 m * closer than 0.3 will range as 0.3m
Effective cone | 60°

## Location

See the URDF files.

Part | Name | VFOV | HFOV
--- | --- | --- | ---
A | Sonar/Front | 60 ° | 60 °
B | Sonar/Back

To access values by using ALMemory key names, see: Sonars.

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