Abstract: According to one embodiment, a voice mail apparatus includes a voice processor which processes voice messages by a arbitrary processing gain, a gain controller which monitors a signal level of an output signal of the voice processor, and controls the processing gain of the voice processor to change the signal level into a specified level, and a processing controller which makes the gain controller to perform gain control of a learning voice by inputting a portion of the voice message into the voice processor as the learning voice when processing of the voice message is requested or based on predetermined conditions.

Abstract: According to one embodiment, a voice mail apparatus includes a first determining module which determines whether a dual tone multi frequency (DTMF) signal for identifying a processing request of the voice message is contained in a received signal by detecting and comparing a first parameter of a transmission signal from the mail box and the first parameter of the received signal to the mail box, a second determining module which determines whether the DTMF signal is contained in the received signal by detecting and comparing a second parameter of the transmission signal from the mail box and the second parameter of the received signal to the mail box, and a controller which controls execution/stop of processing of the voice message based on a determination result by the second determining module.

Abstract: According to one embodiment, a voice mail apparatus includes a voice processor which processes voice messages by a arbitrary processing gain, a gain controller which monitors a signal level of an output signal of the voice processor, and controls the processing gain of the voice processor to change the signal level into a specified level, and a processing controller which makes the gain controller to perform gain control of a learning voice by inputting a portion of the voice message into the voice processor as the learning voice when processing of the voice message is requested or based on predetermined conditions.

Abstract: A sound insulating floor structure comprises an underlying floor layer of a raised floor constructed by supporting a plurality of underlying floor panels at a predetermined height by means of a group of supporting legs installed on a foundation floor via elastic pedestals attached to the lower ends of the supporting legs, floor covering materials laid over the underlying floor layer, and intermediate materials laid between the underlying floor layer and the floor covering materials. The intermediate material is a hardboard or a high density fiberboard having the flexural strength of 35-50 [N/mm2], Young's modulus in flexure of 4,000-5,000 [N/mm2] and the density of 0.8-1.2 [g/cm3].

Abstract: A sound insulating floor structure comprises an underlying floor layer of a raised floor constructed by supporting a plurality of underlying floor panels at a predetermined height by means of a group of supporting legs installed on a foundation floor via elastic pedestals attached to the lower ends of the supporting legs, floor covering materials laid over the underlying floor layer, and intermediate materials laid between the underlying floor layer and the floor covering materials. The intermediate material is a hardboard or a high density fiberboard having the flexural strength of 35-50 [N/mm2], Young's modulus in flexure of 4,000-5,000 [N/mm2] and the density of 0.8-1.2 [g/cm3].