Compact assembly adds low-level sound into environment to obscure ambient noise, achieving conversational privacy in designated areas. Easy-to-install system may be used in general application to increase privacy and/or productivity in individual cubical and work areas by “blocking out” surrounding conversation. It is also used in individual office areas, common waiting areas, and professional offices where confidential conversations occur. The equalized masking sound lowers intelligibility and

It is converted to 70.7 volt operation by cutting the white jumpers across resistors R2 & R5. Resistor R1 is located on the PC Board attached to the VU meter. Resistor R5 is on the terminal strip located on the subpanel. The VU meter is factory calibrated to read 0dB with a 25 volt peak sine wave input. By removing the jumper across resistor R1, the meter will read 0dB with a 70 Volt peak input. The meter sensitivity can be field adjusted by means of the pot (R4) on the VU meter PC Board. The