Imaging spectrometers are used specifically for the purpose of measuring the spectral content of light and electromagnetic light.

The detector array signals supply data pertaining to spectral content, in particular, spatially resolved source points inside source area.

The line is then scanned in order to build a database of information about the spectral content.

Analysis of lighting quality particularly emphasizes use of natural lighting, but also considers spectral content if artificial light is to be used.

They augmented a scatterplot using sounds that varied along frequency, spectral content, and amplitude modulation dimensions to use in classification.

The Wiener filter equation above requires us to know the spectral content of a typical image, and also that of the noise.

However, such processing techniques often reveal spectral content even among data which appears noisy in the time domain.

In fact, different sleep stages are commonly characterized by their spectral content.

Alternatively, one might be interested in their spectral content only during a certain time period.

The real reason for the difference probably relates to the way in which our ears analyse sounds in terms of spectral content along the cochlea.