Abstract: A playback sound provision device includes: a surrounding information detection device configured to detect detection information including information on a three-dimensional object or a planar display around the vehicle; and a control device configured to determine a playback method for a playback sound based on a music piece based on the detection information when a predetermined target is included in the detection information, and provide the playback sound based on the playback method.

Abstract: A playback sound provision device includes: a surrounding information detection device configured to detect detection information including information on a three-dimensional object or a planar display around the vehicle; and a control device configured to determine a playback method for a playback sound based on a music piece based on the detection information when a predetermined target is included in the detection information, and provide the playback sound based on the playback method.

Abstract: A playback sound provision device includes: a surrounding information detection device configured to detect detection information including information on a three-dimensional object or a planar display around the vehicle; and a control device configured to determine a playback method for a playback sound based on a music piece based on the detection information when a predetermined target is included in the detection information, and provide the playback sound based on the playback method.

Abstract: A playback sound provision device includes: a surrounding information detection device configured to detect detection information including information on a three-dimensional object or a planar display around the vehicle; and a control device configured to determine a playback method for a playback sound based on a music piece based on the detection information when a predetermined target is included in the detection information, and provide the playback sound based on the playback method.

Abstract: A playback sound provision device includes: a surrounding information detection device configured to detect detection information including information on a three-dimensional object or a planar display around the vehicle; and a control device configured to determine a playback method for a playback sound based on a music piece based on the detection information when a predetermined target is included in the detection information, and provide the playback sound based on the playback method.

Abstract: A playback sound provision device includes: a surrounding information detection device configured to detect detection information including information on a three-dimensional object or a planar display around the vehicle; and a control device configured to determine a playback method for a playback sound based on a music piece based on the detection information when a predetermined target is included in the detection information, and provide the playback sound based on the playback method.

Abstract: A process for producing a honeycomb structure includes: a mixing step where forming raw materials including a ceramic raw material are mixed to obtain a forming blended material, a kneading step where the forming blended material is kneaded to obtain kneaded clay, a forming step where the kneaded clay is formed into a honeycomb shape to obtain a honeycomb formed article, and a firing step where the honeycomb formed article is fired to obtain a honeycomb structure. The ceramic raw material is a cordierite forming raw material, and a magnetic powder contained in the kneaded clay is at a ratio of 400 ppm or less with respect to solid content conversion mass of the whole kneaded clay. There is provided a honeycomb structure capable of improving trapping efficiency, in particular, initial trapping efficiency by reducing the number of coarse pores in the partition walls.

Abstract: A honeycomb structure 10 of the present invention is provided with porous partition walls 12 made of a ceramic material containing cordierite as a main crystal phase and separating and forming a plurality of cells 14 functioning as fluid passages. The partition walls 12 contain sodium at 0.08 to 0.15 mass % in terms of sodium oxide. A honeycomb structure having a large average pore size can be provided.

Abstract: A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 ?m to 20 ?m (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L1 of from 0.5% to 30% (exclusive) of the partition wall thickness L2; and mass per filtration area of from 0.01 mg/cm2 to 6 mg/cm2 (exclusive). The base material has an average pore diameter of from 10 ?m to 60 ?m (exclusive) and a porosity of from 40% to 65% (exclusive).

Abstract: A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 ?m to 20 ?m (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L1 of from 0.5% to 30% (exclusive) of the partition wall thickness L2; and mass per filtration area of from 0.01 mg/cm2 to 6 mg/cm2 (exclusive). The base material has an average pore diameter of from 10 ?m to 60 ?m (exclusive) and a porosity of from 40% to 65% (exclusive).

Abstract: A process for producing a honeycomb structure by obtaining clay from a cordierite-forming raw material containing an alumina source, a silica source, and a magnesia source; and forming the clay into a honeycomb shape, wherein a material having, in its volume particle size distribution, a 50 volume % particle size (V50) [?m] of 1 to 25 ?m is used, as each of alumina source, silica source, and magnesia source; and a material having, in the volume particle size distribution of the whole cordierite-forming raw material, a ratio of 90 volume % particle size (Vall90) [?m] to 10 volume % particle size (Vall10) [?m] [a volume particle size distribution ratio (Vall90/Vall10)] of 10 or less and a difference (Vall90?Vall10) between 90 volume % particle size (Vall90) [?m] and 10 volume % particle size (Vall10) [?m] of 25 ?m or less is used, as the cordierite-forming raw material.

Abstract: A honeycomb structure 10 of the present invention is provided with porous partition walls 12 made of a ceramic material containing cordierite as a main crystal phase and separating and forming a plurality of cells 14 functioning as fluid passages. The partition walls 12 contain sodium at 0.08 to 0.15 mass % in terms of sodium oxide. A honeycomb structure having a large average pore size can be provided.

Abstract: There is provided a method for manufacturing a honeycomb structure capable of inhibiting a cut due to drying or firing from generating upon manufacturing a large-sized honeycomb structure. The method for manufacturing a honeycomb structure comprises the steps of: forming kneaded clay containing 3 to 6 parts by mass of a water-absorbent resin having a water-absorption ratio of 10 to 20 times with respect to 100 parts by mass of an oxide ceramic-forming raw material into a honeycomb shape to obtain a honeycomb formed article, drying the honeycomb formed article to obtain a honeycomb dried article, and firing the honeycomb dried article to obtain a honeycomb structure having a volume of 15 to 30 liter and a porosity of 55 to 70%.

Abstract: A process for producing a honeycomb structure includes: a mixing step where forming raw materials including a ceramic raw material are mixed to obtain a forming blended material, a kneading step where the forming blended material is kneaded to obtain kneaded clay, a forming step where the kneaded clay is formed into a honeycomb shape to obtain a honeycomb formed article, and a firing step where the honeycomb formed article is fired to obtain a honeycomb structure. The ceramic raw material is a cordierite forming raw material, and a magnetic powder contained in the kneaded clay is at a ratio of 400 ppm or less with respect to solid content conversion mass of the whole kneaded clay. There is provided a honeycomb structure capable of improving trapping efficiency, in particular, initial trapping efficiency by reducing the number of coarse pores in the partition walls.

Abstract: A process for producing a honeycomb structure by obtaining clay from a cordierite-forming raw material containing an alumina source, a silica source, and a magnesia source; and forming the clay into a honeycomb shape, wherein a material having, in its volume particle size distribution, a 50 volume % particle size (V50) [?m] of 1 to 25 ?m is used, as each of alumina source, silica source, and magnesia source; and a material having, in the volume particle size distribution of the whole cordierite-forming raw material, a ratio of 90 volume % particle size (Vall90) [?m] to 10 volume % particle size (Vall10) [?m] [a volume particle size distribution ratio (Vall90/Vall10)] of 10 or less and a difference (Vall90?Vall10) between 90 volume % particle size (Vall90) [?m] and 10 volume % particle size (Vall10) [?m] of 25 ?m or less is used, as the cordierite-forming raw material.

Abstract: There is disclosed a honeycomb filter capable of minimizing an initial pressure loss during an exhaust gas treatment in a state in which a high efficiency is maintained in trapping particulate matters included in an exhaust gas. In the honeycomb filter which includes porous partition walls to define and form a plurality of cells constituting channels of a fluid and in which the predetermined cells each opened at one end thereof and plugged at the other end thereof and the remaining cells each plugged at one end thereof and opened at the other end thereof are alternately arranged, an average pore diameter of the partition walls is in a range of 8 to 18 ?m, and a standard deviation in terms of common logarithm in pore diameter distribution, when pore diameters are expressed in terms of common logarithm, is in a range of 0.2 to 0.5.