Browse Prior Art Database

Two Mode Speaker Outlet for Hands-free and Normal Operation

IP.com Disclosure Number: IPCOM000124520D
Original Publication Date: 2005-May-20
Included in the Prior Art Database: 2005-May-20
Document File: 2 page(s) / 100K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

A mobile phone comprises a dual-mode loudspeaker that is used in both hands-free and normal modes. Special care must be taken for the hands-free mode since the loudspeaker is then run in a rather high volume, and therefore the risk of hearing damages is increased. Up to now, the user is prompted by the user interface to confirm the activation of the hands-free mode. That activation is usually performed only by digitally controlling the speaker driving circuit of the mobile phone. The sound level on which the loudspeaker is run is controlled by software. If the mobile phone is passed to a third party to take over the conversation, it may nevertheless lead to a hearing damage. The main reason for a hearing damage is that the sound pressure is too high. The form of the speaker outlet contributes to this, since the speaker outlet is usually formed as a relatively small spot. The idea is to modify the sound outlet in a way that it is closer to the loudspeaker membrane in normal mode and further away in hands-free mode (see Fig. 1). In a possible embodiment, the sound outlet, which especially is a funnel-like structure, comprises holes that are opened when the sound outlet is in hands-free mode, and closed when the sound is in normal mode.

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Two Mode Speaker Outlet for Hands-free and Normal Operation

Idea: Michael Hoeyer, DK-Aalborg

A mobile phone comprises a dual-mode loudspeaker that is used in both hands-free and normal modes. Special care must be taken for the hands-free mode since the loudspeaker is then run in a rather high volume, and therefore the risk of hearing damages is increased.

Up to now, the user is prompted by the user interface to confirm the activation of the hands-free mode. That activation is usually performed only by digitally controlling the speaker driving circuit of the mobile phone. The sound level on which the loudspeaker is run is controlled by software. If the mobile phone is passed to a third party to take over the conversation, it may nevertheless lead to a hearing damage. The main reason for a hearing damage is that the sound pressure is too high. The form of the speaker outlet contributes to this, since the speaker outlet is usually formed as a relatively small spot.

The idea is to modify the sound outlet in a way that it is closer to the loudspeaker membrane in normal mode and further away in hands-free mode (see Fig. 1).

In a possible embodiment, the sound outlet, which especially is a funnel-like structure, comprises holes that are opened when the sound outlet is in hands-free mode, and closed when the sound is in normal mode.

The sound outlet can be constructed as a kind of button that can be pressed, lifted or turned to change between hands-free and normal modes. I...