The Dorrough 340-C Surround Sound Meter +20dB is a single-channel straight-line display loudness meter with 20dB headroom. It is used for applications where several meters are required and is ideal for HDTV 5.1 and 7.1 Surround Sound applications. The Model 240-A is designed for vertical mounting and is outfitted for XLR connections.
Actual Energy Display
Dorrough Loudness Meters display actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. This feature allows all program material to be adjusted for equal perceived loudness while protecting the peak of the
waveform.
Peak and Average Level Metering
The 340C, like all Dorrough loudness meters, simultaneously displays peak and average. The relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale.
Right and Left In puts for Stereo Mixing
With one instrument, the operator can easily see the stereo mix and avoid classic in-phase/out-of-phase problems as well as center channel buildup that causes a mix to seem louder. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.
Made for Surround Sound Applications
This single channel straight line loudness meter is ideal for applications where serveral meters are required, such as Surround Sound. They are particularly useful for HDTV 5.1 and 7.1.