Abstract: A holder for a mobile phone includes a body having an opening to receive the mobile phone and having a bottom. The holder further includes a latch coupled to the body for holding the holder with the opening up; and includes rear walls, side walls and a front wall that includes an opening that corresponds to the screen of the mobile phone and includes a mechanism to force the mobile phone to press against the front wall to create a cavity of air between the rear of the mobile phone and the back of the holder, where the top of the cavity is open to allow sound to propagate from near the bottom of the mobile phone through the top thereby amplifying the sound making the sound propagate primarily in an upward direction. The holder also has a clip mechanism feature that uses upward tilted teeth that bite on the front side of a seat belt to allow secure holding even when the user is withdrawing their mobile phone from the holder.

Abstract: A holder for a mobile phone includes a body having an opening to receive the mobile phone and having a bottom. The holder further includes a latch coupled to the body for holding the holder with the opening up; and includes rear walls, side walls and a front wall that includes an opening that corresponds to the screen of the mobile phone and includes a mechanism to force the mobile phone to press against the front wall to create a cavity of air between the rear of the mobile phone and the back of the holder, where the top of the cavity is open to allow sound to propagate from near the bottom of the mobile phone through the top thereby amplifying the sound making the sound propagate primarily in an upward direction. The holder also has a clip mechanism feature that uses upward tilted teeth that bite on the front side of a seat belt to allow secure holding even when the user is withdrawing their mobile phone from the holder.

Abstract: A holder for a mobile phone includes a body having an opening to receive the mobile phone and having a bottom. The holder further includes a latch coupled to the body for holding the holder with the opening up; and an acoustic horn coupled to the body and having a sound receiving end and a sound emitting end. The sound receiving end is configured to be adjacent to a transducer of the mobile phone, and the sound emitting end is configured to direct sound in an upward direction. The holder further includes a set of tactile guides to tactilely guide a user's touch to a set of buttons on the mobile phone so that a user does not need to look at the buttons to activate the buttons.