Devices and methods for determining the density of insulation

A method for determining the density of insulation, the method comprising:

• providing a device comprising:
• a first unit comprising a sound generator;
• a second unit comprising:
• a sound sensor;
• and
• a probe that is configured to be inserted into insulation such that the sound sensor is outside of the insulation and is configured to detect sound that is generated by the sound generator outside of the insulation and transmitted through the insulation and the probe to the sound sensor;
• and
• a control system configured to:
• cause the sound generator to generate the sound;
• and
• use the sound detected by the sound sensor to generate output that represents the density of the insulation;
• positioning the first unit against the insulation such that the sound generator is outside of the insulation;
• inserting the probe into the insulation such that the sound sensor is outside of the insulation, wherein inserting the probe into the insulation comprises inserting the probe such that 0.5 inches to 5.5 inches of the probe is within the insulation;
• causing, via the control system, the sound generator to generate sound that travels through the insulation from outside of the insulation;
• detecting, via the sound sensor, the sound that is generated by the sound generator and travels through the inserted probe to the sound sensor;
• and
• using, via the control system, the detected sound to generate output that represents the density of the insulation.

A device for determining the density of insulation, the device comprising:

• a first unit comprising a sound generator;
• a second unit comprising:
• a sound sensor;
• and
• a probe that is configured to be inserted into insulation such that the sound sensor is outside of the insulation and is configured to detect sound that is generated by the sound generator outside of the insulation and transmitted through the insulation and the probe to the sound sensor;
• and
• a control system configured to:
• cause the sound generator to generate the sound, the sound having a duration in the range of 0.25 seconds to 3 seconds;
• and
• use the sound detected by the sound sensor to generate output that represents the density of the insulation.