SonoCat

Complex in-situ noise measurements made easy!

  Certain noises in our modern life can have detrimental effects on our hearing. To avoid such side effects, we must reduce the unwanted noise. But noise varies depending on the listening conditions and diffusion. Measurements and simulations help identify the root cause of an emanating source. However, noise testing is primarily carried out in laboratory conditions. But laboratory conditions are unrealistic, laboratory tests are restrictive, costly, and time-consuming.

In-situ on-site measurements allow an exposition of an actual situation.

  The SonoCat is a multi-functional spherical microphone array. It consists of eight digital MEMS microphones located in a rigid sphere. They are used to collect all the acoustic data required for the calculation of the sound pressure level, the 3D sound intensity vector, and the sound absorption coefficient. The SonoCat is calibrated at a high standard and can be used to perform both point and scan measurements. For example, a point measurement can be used to measure the sound pressure or the 3D intensity vector to locate where a sound source is emitting. A scan measurement can provide the sound power of a machine or the average sound absorption of a surface.

  The SonoCat is connected to a PC or a tablet with the SonoCat software where it can be used for monitoring, acquisition and analysis of the recorded sound field.

How it works?

The sound absorption coefficient is defined as the ratio between the active and the incident sound power in relation to a surface. In classic measurements, the sound pressure and sound intensity are measured in a control sound field, with the assumption that the material under test will behave the same way in an anechoic environment and in-situ. This might not be the case. Instead of considering the global sound field the local plane-wave method takes the local sound field into consideration and assumes that the normal component of the sound field in each point can be described by an incident and a reflected plane wave. If we assume local plane waves near the surface, the effective in-situ absorption coefficient can be derived from sound field measurements. So we don’t need to take the equipment to a lab, we bring the measuring equipment to the actual sound field.

Product Features

Ø   Sound Pressure Level Measurements – can measure sound pressure level in A, C, and Z weighting. The sound pressure level is calculated according to IEC 61672-1 standard.

Ø   Absorption Coefficient Measurements

Ø   Source Localization

Applications：

ü   In-situ Absorption Coefficient Measurements

ü   Source Localization

In-situ absorption coefficient measurements in a hall.

In-situ absorption coefficient measurements in a car.

Specifications

SonoCat size：365×65×45 mm

weight：210g

General working frequency range：20Hz – 20kHz

Accurate absorption coefficient measurement range：50Hz – 6300Hz

Acoustic dynamic range (SPL)：29 – 116dB(A)

Sampling rate：48kHz

Bit depth：24Bit

Package photos